In exchange for the Vehicle, the Buyer will pay Seller the total purchase price of the. The letter details the chassis number, model, make, color, and engine number of the vehicle being sold.CAR (California Association of Realtors) residential purchase and sale agreements are widely used in real estate transactions throughout California. ("Broker") beginning (date). California Realtors (CAR), use a contract entitled Real Estate Purchase Agreement, including Escrow Instructions and Notice to Perform.