The vehicle sales agreement is between a seller and buyer for the sale of a vehicle. It specifies the vehicle make, model, year, and other details.This document outlines an agreement for the sale of a salvaged or damaged vehicle. Vehicle Information. THIS PURCHASE AND SALE AGREEMENT, (the "Agreement") is made and entered into this _____ day of. 1. Be specific about the car being sold. Include the make, model, year, VIN number, and mileage in the contract to avoid any confusion. Nigerian Sales Agreement.