Learn how to sell a travel trailer in Texas with our comprehensive RV Bill of Sale guide. Get step-by-step instructions, key documents, and FAQs.This is typically one of the first items you'll put on the bill of sale. Homemade, shop-made and travel trailers. A Recreational Vehicle (RV) Bill of Sale is required anytime an RV is sold or transferred between a seller and a buyer. A bill of sale allows the seller and the buyer to complete the transfer of ownership in a legal and safe way.