The bill of sale must state the sellers name, the buyers name and the year, make and vehicle identification number and the purchase price of the vehicle. Motor Vehicle, Mobile Home, Off- Highway or Vessel Description. Year.Learn about Florida Bill of Sale requirements. Get forms and templates to document the sale of items such as cars, boats, horses, firearms, and more. Proof of ownership – This is the vehicle's existing title that identifies you as the owner. It is signed as the last step in the sales process after both parties have received possession of the exchange. Make an appointment with the mva. How to fill out the Maryland Trailer Bill of Sale Form Instructions?