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.The form consists of the significant vehicle, buyer, seller, and sale data, along with affirming signatures from both parties. A completed Application for Texas Title and or Registration (Form 130-U); Applicable fees. A Recreational Vehicle (RV) Bill of Sale is required anytime an RV is sold or transferred between a seller and a buyer. County of Harris. §. State the name and address of the buyer and seller.