1999 F350 Crew Cab Lariat dually

Has the 7.3L Powerstroke diesel. Runs great, no leaks. Tan leather interior with no tears. Has a newer Knapheide flatbed with gooseneck ball, storage compartments and a custom made 220gal fuel tank with 20gpm Fill-Rite pump and 1" hose. Has never pulled a gooseneck trailer. Power windows and locks, AC, and also air bags in rear suspension. Less than 6000 miles on new tires and has one year old batteries. Getting rid of because need more fuel capacity, so getting fuel trailer. Will be consigned on Steffes Group online auction starting Nov 29 and ending Dec 4th.