Nigerian Sales Agreement. 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. How to Write a Real Estate Purchase Agreement. The buyer takes the full ownership of the Vehicle (Make, Registration Number). bearing. When buying a vehicle or equipment for your business, use this Vehicle and Equipment Purchase Agreement to protect yourself from unwarranted liabilities. An Illinois motor vehicle bill of sale documents the purchase and sale of a motor vehicle between a private seller and buyer in the State of Illinois. It outlines the parties to the agreement, details of the motorcycle being sold including make, model, and vehicle identification numbers.