1. Identify the buyer, seller, and the reason for the contract. This car purchase agreement template is a standard agreement made completely customizable for your individual needs.When buying a vehicle or equipment for your business, use this Vehicle and Equipment Purchase Agreement to protect yourself from unwarranted liabilities. If you're buying or selling a used car, print two copies out and complete them in front of the other party. Both buyer and seller should sign and keep a copy of. How to sell your used car or truck privately in California. Read the the steps and forms you need for selling a used car on your own in California. This form is made available to real estate professionals through an agreement with or purchase from the California Association of REALTORS®. The date of the sale of the Vehicle will be ______, 20__. 2.