In exchange for the Vehicle, the Buyer will pay Seller the total purchase price of the. Use this car purchase agreement template to customize the financing information for your car along with other required details.Odometer Declaration. With our free Sales Agreement form, you'll be ready to print or download your contract in no time. Information you can expect to fill out includes the car's VIN, make, and model, the name and permanent address of each party involved, and the sales amount.