Don’t miss this opportunity to own a 2022 72 Viking Convertible Yacht - El Lobo. This boat is tournament rigged with the latest and greatest equipment available to include the 16V M96L MTUs, Furuno 8L Sonar, Full Palm Beach Tower, SeaKeeper 26, and Custom Tuna Tubes. El Lobo’s interior appointments were tastefully upgraded throughout and her custom Blue hull paint gives the exterior a truly striking appearance. El Lobo is a Like New Opportunity and with MTU and Seakeeper Warranties until 2025.

Décor

• Satin Finish Throughout
• Walnut Interior Wood
• Upgrade Door Hardware to Recessed Hinges
• Salon Door Type Catches on Stateroom Doors
• Sofa, Upgraded Dewberry Style,
• Custom Wallpaper Material
• Custom Headliner Material throughout Boat, Pearl Finesse Legend White
• Brushed Nickel Hardware Throughout
• Brushed Nickel Coverplates for Switches & Receptacles Throughout
• Satin Nickel Interior Light Trim Throughout
• Interior Doors Stile & Rail
• Carpet Throughout Fabrica Alluvial
• Hull Sealers: Pearl Finesse Legend Eggshell (All Walls and Sealers)
• White Head Sinks (Except Day Head)
• Helm Chair: Cora Outdoor-Frozen W/Welt Promessa Outdoor-Marine Midnight
• Companion Chairs: Cora Outdoor-Frozen W/Welt Promessa Outdoor-Marine Midnight
• Bridge Cushions: Cora Outdoor-Frozen W/Welt Promessa Outdoor-Marine Midnight 
• Mezzanine Cushions: Cora Outdoor-Frozen W/Welt Promessa Outdoor-Marine Midnight; Bentley Stitching. Drink Bolster
• Upgraded: Mattress Pads
• Barstools, With Back-3 In Pearlized-Pewter W/Welt In (13) Antico -Fossil on Back Only. Small Bentley Stitch on Seats Only

Salon

• Electric Panel Up
• Carpet Runner, Full, Canvas
• Cocktail Table
• 55" Pop-Up Television in Entertainment Center
• Day Head in Salon
• Wood On Aft Side of Galley Island
• Wood Mirror on Aft Side of Galley Island
• Companionway, Costa, Canvas Carpet Runner W/ Step Covers
• Wood Crown Molding
• Clear Icemaker
• Salon Door with Electric Door Opener
• Custom Amtico Flooring at Salon Entranceway
• Dimmers On Overhead LED Lights
• Wood Wire Boxes
• Wood Strips in Salon Headliner
• Poseidon Dove Light Filtered Blinds
• Valances
• Custom: 43" Tv on Bulkhead Above Dinette 
• Custom: 110v Outlet with USB In Port Aft
• Custom: A/V System

Salon Day Head

• Headhunter Head System
• Custom Amtico Flooring
• Towel Bars & Rings
• Brushed Nickel
• Satin Nickel Faucet
• Custom: Pental Quartz Vanity Top with Flat Polished Edge

Dinette

• Wood Dinette Table with Wood Pedestal
• Wood Crown Molding
• AC Receptacle Under Dinette Table

Galley

• U Shaped Galley
• Undercounter Refrigerator and Freezer with Drawers
• Additional Undercounter Refrigerator with Drawers
• Trash Compactor
• 110v Outlet Next to Switch on Bottom of Upper Cabinet Above Sink
• Sink To Be Stainless Steel Undermount
• 4 Burner Surface Mount Range
• Custom Amtico Flooring in Galley
• Galley Overhang
• Satin Nickel Faucet
• Dimmer On Overhead LED Lights
• Custom: Door in Bulkhead Outside Pantry Door for Access to Brow Storage
• Custom: Miele Oven Under Cook Top
• Custom: Vintage Teak Dinette Platform
• Custom: Pental Quartz Countertop, With Flat Polished Edge
• Custom: Pental Quartz Backsplash, Polished
• Custom: Wood Island Backsplash

Companionway

• Custom: Wood Door and Frame for Linen Closet 
• Custom: Pearl Finese Legend White Companion Walls. Top And Bottom Sections: Pearl Finesse Legend Eggshell
• Custom: Horizontal Wood Stripping

Master Stateroom

• Mattress Viking Slumber #8
• 12v Cd/Dvd Stereo W/Bluetooth Capability
• Wood End Table Tops
• Wood Crown Molding
• Dimmer On Overhead LED Lights
• 40" Flat Panel Television

Master Stateroom Head

• Mirror Ceiling
• Headhunter Head System
• Wood Face on Lower Vanity
• One Piece Custom Frameless Glass Shower Door
• Custom Amtico Flooring
• Satin Nickel Shower Fixtures
• Brushed Nickel Towel Bars & Rings
• Satin Nickel Faucet
• Custom: Pental Quartz Vanity Top with Flat Polished Edge                                                                            
• Custom: Stone Nighstand Tops and Columns                                                                                       
• Custom: Pental Quartz Nighstand Tops/Backs with Flat Polished Edge                                    
• Custom: Headboard                                                                                      
• Custom: Sconces In Stone Column Above Nightstand

Forward Stateroom

• Mattress Viking Slumber #6
• Island Queen Bunk Forward 
• 32" Flat Screen Television
• Dimmer On Overhead LED Lights
• 12v Cd/Dvd Stereo with Blue Tooth Capability
• Custom: Fabric Headboard

Forward Stateroom Head

• Mirror Ceiling
• Headhunter Head System
• Chrome Shower Door
• Custom Amtico Flooring
• Satin Nickel Shower Fixtures
• Brushed Nickel Towel Bars and Rings
• Satin Nickel Faucet
• Wood Face On Lower Vanity
• Custom: Pental Quartz Vanity Top with Flat Polished Edge

Port Guest Stateroom

• Mattress Viking Slumber #6
• Dimmer On Overhead LED Lights
• Locker Storage Top to Be Wood
• 12v Cd Dvd Stereo with Bluetooth Capability
• 22" Flat Screen Television

Port Head

• Mirror Ceiling
• Headhunter Head System
• Custom Amtico Flooring
• Chrome Shower Door
• Satin Nickel Shower Fixtures
• Brushed Nickel Towel Bars & Rings
• Faucet To Be Satin Nickel
• Wood Face On Lower Vanity
• Granite Vanity Top
• Custom: Pental Quartz Vanity Top with Flat Polished Edge

Flybridge

• Electronic Single-Lever Controls for Helm Pod
• Recessed Electronics Boxes
• Helm Air Conditioning
• Bridge Freezer Box
• Removable Flybridge Jumpseat Backrest
• Refrigerated Bridge Drink Box
• Release Teak Helm PodWatermaker Control Panel on Flybridge
• LED Floodlights in Hardtop
• Split Radio Box Lids
• Fresh Water Outlet on Bridge
• VHF Radio Icom-604
• Switch In Radiobox for Electronic Drop-Down Overhead Box in Hardtop
• Single Lever Control Handles W/Bow
• Thruster Button in Handles
• Dedicated Freshwater Washdown Feed for Tower with Shutoff
• Handrail On Side of Helm Console Above Helm Access Door
• Dedicated Batteries for Electronics
• Custom: Upgrade Chairs to Release Trillion Series
• Custom: Compass in Electronics Box
• Custom: Rod Racks Under Both Bridge Seats
• Custom: Recessed in Fiberglass and Finger Pulls for Acrylic Lid. No Push Buttons.
• Custom: Costa Plastic Enclosure Track
• Custom: Custom Jump Seat and Helm Chair Backrests
• Custom: Flip Down Sonar Control Cabinet Under helm Pod

Cockpit

• Mezzanine Cockpit w/ Cruisair "Cool Breeze" Mezzanine Air System
• Refrigerated Cockpit Step Box
• Second Cablemaster in Cockpit
• Transom Coaming with Gate and Fish Box
• Refrigerated Starboard Mezzanine
• Undermounted Step Box
• Transom Box as Live Well
• Costa, Cockpit Sunshade with Carbon Fiber Poles
• Costa, Cockpit Cover
• Transom Swim Steps
• Crushed Ice Machine with Discharge in Stbd Mezzanine Box
• Two 24v 30amp Outlets Forward Under Coaming, One on Each Side
• (2) 12VDC 30 Amp Outlets Under Coaming, One on Each Side
• Cockpit Freezer Bait Trays
• Teak Cockpit Sole
• Storage Lockers Under Port and Starboard Coamings
• Split Lid for Cockpit Fish Box
• Tri Color Lights in Aft Deck Overhang
• Tri Color Rope Lights Under Coaming
• Custom: Release Trillion Series Fighting Chair

Crew Quarters

• Mattress Viking Slumber #6
• Locker W/ Top Wood
• Dimmer On Overhead LED Lights
• Drawer Storage Top to Be Wood
• 12v Cd Dvd Stereo with Bluetooth Capability
• 22" Flat Screen Television

Crew Head

• Mirror Ceiling
• Headhunter Head System
• Wood Face On Lower Vanity
• Custom Amtico Flooring
• Chrome Shower Door
• Satin Nickel Shower Fixtures
• Brushed Nickel Towel Bars & Rings
• Satin Nickel Faucet
• Custom: Pental Quartz Vanity Top with Flat Polished Edge
• Custom: Wood Doors IPO Mirror for Storage Outboard of Bunks

Hull

• Seakeeper Gyro SK 26
• Additional Fuel Tank for A Total Of (3) Tanks
• DC Bow Thruster
• “El Lobo” Blue Hull Paint

Engine Room

• Onan 29kw Generator
• Fuel Priming Pumps 24v
• Access Door To Crews Quarters
• PVC Trim Painted Snow White at Engine Room
• Two Toolboxes in Engine Room 5 Drawer 16" Wide Painted White
• Headhunter Fresh Water Pump
• Backup Pump for Seawater System
• Willy Vac
• Custom: Dometic XZ2 Series Watermaker Spot Zero Combo Unit
• Custom: AME Specified Sonar Tube
• Custom: Electrosea System
• Custom: (2) Scott Pumps Aft and Centered in Engine Room

Mechanical

• Second Chiller Logic Control Panel in Forward Pantry
• Tee In Dockside Water Manifold to Fill Water Tank from Cockpit
• Deck Fill for Fresh Water Tank
• Custom: External Strainers for Bait System Pump Pick-Ups

Deck and Exterior

• Bow Cleats Fore & Aft
• Lewmar V4 SS Windlass (Gypsy And Drum)
• Removable Stainless Steel Anchor Fairlead
• Fresh Water Washdown at Bow Inside Anchor Locker
• Temp Mount Running, Transom, Mast Light, Boat to Get Tower
• Anchor Bracket in Anchor Locker (Only Available with No Pulpit)
• Upgraded Stainless Anchor to Lewmar Delta

Palm Beach Towers

• Tuna Tower w/Molded Top 72' Convertible 9’ 6" Gap, Brushed Pipe (2) Antenna, Stand-offs, no halyards, 3 sided track on perimeter rail
• (8) Hardtop Lights Lumitec, tri-color w/ fiberglass recess 
• Radar Pod, Bullet Style #973, Large Sliding Door, Bracket & Runs for Teaser Reels
• Slide down display bracket mounted aft in teaser reel compartment
• Molded round wedge Fwd on hardtop to mount FLIR camera
• Instrument Box Electric Fold Down
• Navigation Lights - Port, Stbd & Stern Molded 
• Molded Standing Platform w/ Coupler Box on Platform  
• Rigid Industries 50" RDS LED light bar with defused lenses mounted in custom molded light pod, Aft.
• Rigid Industries 20" RDS LED light bar with defused lenses mounted in custom molded light pod, Fwd.
• Tower Sunshade Molded w/ internal tracks, welded antenna mounts
• Bench seat w/ backrest
• Satin Black Painted Tower Sunshade Frame 
• Antenna Mount SAT TV Dome molded fiberglass 
• Antenna Mount SAT phone on hardtop molded fiberglass 
• Washdown water in tower
• Control Box 63" w/ Flush Mounted compass 
• (2) Recessed Electronics Boxes with Lids
• Satin Black painted top Control Box 
• Bow thruster joystick control on control box
• MTU Controls Blue Vision System for M96 Series with Electric Steering 
• U shaped safety rail around bridge ladder opening
• 47' Rupp Outriggers, "Big Riggs HD" 47' ─ 4 Spreader Bridge Release, Heavy AFT Bar 
• Rupp Outriggers 
• Rupp Hydraulic Outrigger System, Lay-out only with hydraulic locks
• Rupp Hydraulic System
• Rupp rollers installed on Outriggers IPO eyebolts
• (4) Teaser line collars for riggers 
• Rupp Center Rigger, HD Series
• Bridge Rail 3 sided double AFT 
• (8) Rod Holder Polished Weld to AFT Bridge Rail, PBT Style 
• (6) Rod Holder Polished AFT Legs, PBT Style 
• (2) Electric Teaser Reels MIYA EPOCH Super US9 24v with high-speed motor
• Flag Staff AFT
• Enclosure 3-sided AFT edge helm, track to track EZ2CY
• PVC flangeless enclosure track mounted on bridge cap
• (3) Air vent FWD top panel
• Upgrade Tower X-Brace, side diagonals, and hardtop braces to be contour style
•  (6) Recessed Lights, (3) Spreader Lights, Teaser Reels, Anchor/Nav Lights, Bond Tower
• DHR LED 5 Mile Masthead Light on Tower Sunshade
• Anchor light mounted on pole top of sunshade
• (2) Recessed lights tri-color underside of Platform 
• (2) Recessed lights tri-color underside of Tower Sunshade
• Tri-color lights - (2) platform & (2) Tower Sunshade
• Pair Rupp Marine halyard grommets mounted in gunnels
• Control Box Cover
• (2) Flag Staff welded under Platform
• Pair of s/s teaser line grommets underside hardtop
• Pair of welded teaser line Thru-fittings with inserts
• Upgrade hardtop, platform, & sunshade to be fabricated using carbon fiber
• Removable swim ladder with S/S sockets

AME

• RADAR
• FURUNO DRS25ANXT/6 RADAR W/ 6' ARRAY 
• FURUNO TZT2BB NAVNET TZTOUCH2 
• FURUNO MCU005 TZT2BB CONTROLLER 
• FURUNO GP330B GPS ANTENNA 
• SEATRONX 19" TOUCH SCREEN DISPLAY 
• BULLET TRAIN LONG HAUL15M HDMI CABLE 
• USB HUB BLACKBOX ICI200A 
• (3) VIDEO DIST DVI-D CABLE 10' M-M 
• PLOTTER
• GARMIN GPSMAP8612 TS MFD 
• GARMIN REMOTE INPUT GRID 20 - VERTICAL 
• BULLET TRAIN LONG HAUL15M HDMI CABLE 
• SEATRONX 19" TOUCH SCREEN DISPLAY 
• GARMIN GPS19X GPS ANTENNA 
• NAVIGATION PERIPHERALS
• (2) GARMIN 40' NETWORK CABLE 
• (2) GARMIN GMS10 NETWORK EXPANDER 
• VESPER CORTEX-M1 SMART AIS TRANSPONDER 
• GARMIN GA™ 38 GPS/GLONASS ANTENNA 
• GARMIN USB CARD READER 
• TYCON POWER SYSTEMS DC POE INJECTOR 
• NETWORK
• NMEA 2000 NETWORK COMPONENTS 
• SOUNDER
• FURUNO FCV1900 SOUNDER
• FURUNO CA50BL-12HR 2KW 50KHZ TRANSDUCER 
• FURUNO CA200B-8B 2KW 200KHZ TRANSDUCER 
• SEATRONX 19" TOUCH SCREEN DISPLAY 
• FURUNO IF-NMEA2K INTERFACE 0183-N2K 
• SOUNDER 2
• GARMIN GSD-26 CHIRP VIDEO SOUNDER MODULE 
• AIRMAR PM411C-LWM ULTRA WIDE BEAM 
• SONAR
• FURUNO CSH8L 85kHz 600MM SONAR FULL CIRCLE SCANNING-CSH8040
• SONAR TUBE FURUNO F1918 CH300 1.8M 
• AME CUSTOM SONAR SHAFT FAIRING 
• ATEN VS94A 4 PORT VGA SPLITTER 
• EXTRON 15' MALE-MALE VGA CABLE #26-23
• POLY-PLANAR EXTERNAL (BLK) VHF SPEAKER MFG#MB-41B
• FURUNO IF-NMEA2K INTERFACE 0183-N2K 
• SONAR REMOTE CONTROL FURUNO CSH7040 CSH7040
• AME CUSTOM FURUNO CSH7040 REMOTE MOUNT 
• AUTOPILOT
• GARMIN REACTOR 40 STD COREPACK STEER BY WIRE (010-00705-86)
• GARMIN AUTOPILOT INSTALLATION KIT 
• GARMIN INTERCONNECT CABLE STEER-BY-WIRE
• VHF
• ICOM IC-M605 BLK VHF RADIO 
• (2) ICOM MB75 VHF FLUSH MOUNT F/502,602,802 
• (2) COMROD AV90/2BI 16' VHF ANTENNA 
• (2) AME TOWER/HARDTOP RUPP MOUNT PAK 
• (2) POLY-PLANAR EXTERNAL (BLK) VHF SPEAKER 
• STEREO
• FUSION STEREO MS-RA770-APOLLO SERIES TOUCHSCREEN W/APPLE AIR PLAY
• JL AUDIO M400/4 CHANNEL 100W AMPLIFIER 
• (4) JL M6 MARINE 8.8" WHITE COAX SPEAKER 93608-CLASSIC/SINGLE-BRIDGE FWD & AFT
• HELM
• CARLING USB OUTLET 
• SATCOM
• KVH TRACPHONE V3-HTS WHITE BASE 
• PANASONIC 2-LINE CORDLESS PHONE KX-TG9541B
• ADDITIONAL PANASONIC HANDSET-KXTG9541 
• LUXUL ABR-5000 EPIC 5 GIGABIT ROUTER 
• ARAKNIS NETWORK 210 SERIES WEBSMART 24 PORT GIGABIT SWITCH WITH PARTIAL POE
• LUXUL XAP-810 DUAL-BAND ACCESS POINT 
• CYBERPOWER PR750LCD MINI-TOWER UPS 750VA
• WIFI
• WAVE WIFI ROGUE REACH DB 32" ANTENNA 2.4GHZ/5GHZ
• CAMERA
• (4) GOST WIDE ANGLE 1080P MINI-BALL CAMERA 3- ENGINE ROOM CAMERAS, 1- SALON CAMERA
• (4) PM MINIBALL CAMERA MOUNT 
• ATEN VS94A 4 PORT VGA SPLITTER 
• VM-HD-4 TVI AHD QUAD PROCESSOR 
• THERMAL IMAGING
• FLIR M364C COLOR THERMAL CAMERA SYSTEM 640x512, GYRO, 18mm FOCAL LENGTH
• FLIR M300 SERIES JCU1 CONTROL UNIT 
• FLIR POWER OVER ETHERNET INJECTOR 
• (2) EXTRON 5V COMPOSITE VIDEO DIST AMP MDA 1 X 5 WITH INPUT LOOP THRU
• AME FLIR M-SERIES HARDTOP MOUNT 
• GARMIN NETWORK POE ISOLATION COUPLER 
• SPOTLIGHT
• ACR RCL100 LED SPOTLIGHT W/ CONTROLLER 
• SATTV
• KVH TRACVISION TV6 W/CIRCULAR LNB 01-0369-07
• 3 CUSTOMER-SUPPLIED DISH NETWORK RECEIVERS-SALON, MSR, AND FWD SR
• (2) DISH NETWORK HD WALLY RECEIVER W/ RF REMOTE-PORT AND CREW STATEROOMS
• KVH AC/DC POWER SUPPLY (TV-SERIES) 
• CYBERPOWER PR750LCD MINI-TOWER UPS 750VA
• ATLONA COMPONENT TO COMPOSITE CONVERTER 
• EXTRON 5V COMPOSITE VIDEO DIST AMP MDA 1 X 5 WITH INPUT LOOP THRU
• SALON
• URC MRX-10 MASTER CONTROLLER 
• URC WI-FI REMOTE CONTROL TRC-1080 
• URC RMK-1 1U RACK MOUNTING KIT RMK-1 
• MARANTZ SR6014 9.1 A/V RECEIVER W/ HEOS
• (3) EPISODE 350 SERIES CEILING SPEAKER PAIR 
• SNAPAV IN-WALL PASSIVE SUBWOOFERS ES-SUB-IW-DUAL8/DUAL 8"
• SNAPAV DIGITAL SUBWOOFER AMPLIFIER EA-AMP-SUB-1D-300
• SONY UBPX800 BLU-RAY PLAYER 
• CYBERPOWER SMART APP SINEWAVE PR1500 UPS 1050 WATTS-1500VA
• WATTBOX® POWER CONDITIONER, 12 OUTLETS SAFE VOLTAGE, COAX & ETHERNET PROTECTION
• COOL COMPONENTS™, 4-FAN COMPONENT COOLING UNIT WITH POWER SUPPLY
• APPLE TV5 64GB DIGITAL MEDIA RECEIVER MLNC2LL/A
• APPLE TV4/TV5 MOUNT 
• AME CUSTOM A/V RACK 
• FANLESS MINI PC 4GB W/WIFI WINDOWS 10
• ATLONA COMPONENT TO COMPOSITE CONVERTER
• EXTRON 5V COMPOSITE VIDEO DIST AMP MDA 1 X 5 WITH INPUT LOOP THRU
• MSR
• URC MRX-2 NETWORK BASE STATION 
• URC WI-FI REMOTE CONTROL TRC-1080 
• APPLE TV5 64GB DIGITAL MEDIA RECEIVER MLNC2LL/A
• APPLE TV4/TV5 MOUNT
• METRA HDMI 5X1 CS-HDM5X1SW3 
• FWD STATEROOM
• URC MRX-2 NETWORK BASE STATION 
• URC WI-FI REMOTE CONTROL TRC-1080 
• APPLE TV5 4K 64GB DIGITAL MEDIA RECEIVER 
• APPLE TV4/TV5 MOUNT
• METRA HDMI 5X1 CS-HDM5X1SW3 
• TOWER
• GARMIN GPSMAP8612 TS MFD PRELOADED WITH COASTALS CHARTS
• ICOM HM 195B (BLK) HM-195 COMMANDMIC IV 
• (2) ICOM OPC-1541 VHF COMMAND MIC EXTENSION 
• COCKPIT
• FUSION APOLLO ERX400 WIRED REMOTE 
• JL AUDIO M700/5 AMPLIFIER 
• (2) JL M6 MARINE 8" WHITE SUBWOOFER 93615- CLASSIC/SINGLE-HAUNCHES
• (2) JL M6 MARINE 7.7" WHITE COAX SPEAKER 93728-CLASSIC/SINGLE-HAUNCHES
• (2) JAMES LOUDSPEAKER 42UE/OW 4" 2-WAY WHT SINGLE SPEAKER MOUNT UNDER GUNWALE
• AUDIOENGINE B1 BLUETOOTH MUSIC RECEIVER 
• NET
• LUMISHORE TIX803 EOS COLOR CHANGING PAIR LUMI-LINK CMD CENTER, STV2204I & 5M DMX
• (2) LUMISHORE TIX803 EOS COLOR CHANGE SINGLE 
• (4) LUMISHORE 5M DMX EXTENSION CABLE 
• LUMISHORE RS232 TRIGGER MODULE-60-0411 
• (2) LUMISHORE TO GARMIN CONVERSION CABLE
• MEANWELL POWER SUPPLY 24V/25A 709-HEP600-24
• C-MAP CHART, CARIBBEAN * C AMERICA NN3D, WM76, MM3-VNA-027
• GARMIN VSA002R G2 VISION CHARTS SOUTH AMERICA WEST COAST/010-C1063-00
• BLUE CHART SOUTHWEST CARIBBEAN VUSO31R COSTA RICA-PANAMA

Warranties

• MTU-1400 hours or 10/20/25
• ONAN-3000 hours or 10/20/26 
• SEAKEEPER – Silver-2000 sea hours or 10/21/25

Viking Yachts 72 Convertible Manufacturer's Description

American luxury sportfishing and cruising motor yacht builder Viking Yacht Company was founded in 1964. Today, this family-owned and -operated yacht company is a world leader in semi-custom fiberglass yacht production with over 4,000 boats delivered. To the passionate owners of these yachts, the word “Viking” is synonymous with “excellence”.

Viking’s 72 Convertible is designed and built for performance and luxury on long offshore fishing trips or cruises. It features a standard Open Bridge plan and four staterooms, each with a private head. The master stateroom has a king berth. The salon is perfect for entertaining, thanks to the large, J-shaped sofa. The U-shaped galley has custom granite countertops, upper cabinets trimmed with crown molding, and a large walk-in forward pantry and spacious dinette. Overlooking the 209 sqft cockpit is a full mezzanine that will let anglers watch the baits in comfort.

New Viking Yachts for Sale

Used Viking Yachts for Sale