Mobile Home, Off-Highway Vehicle or Vessel. A bill of sale must be furnished showing the price paid to the dealership.An RV Bill of Sale is a legal document that serves as proof of the sale and transfer of ownership of a recreational vehicle (RV) from a seller to a buyer. This is typically one of the first items you'll put on the bill of sale. The bill of sale must show the vehicle description including the year, make, and vehicle identification number (VIN). b. Are you ready to buy a car? Follow these steps to transfer a Florida title and avoid delays. A Recreational Vehicle (RV) Bill of Sale is required anytime an RV is sold or transferred between a seller and a buyer.