County of Harris. §. General Bill of Sale – This form would be used, generally, between two private parties to prove the sale and purchase of the personal property.Bill of Sale to a Motor Vehicle. A bill of sale is a legal document that outlines the purchase of property between a buyer and seller. It commonly includes both parties' information. The Texas bill of sale form verifies the elemental facts of the sale of personal property in exchange for a predetermined compensatory amount. I agree to make payments according to the Payment Schedule in this contract. If more than one person signs as a buyer, I agree to keep all the promises in this. Download one of our bill of sale forms to transfer ownership of an item from one person to another.