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. Visit the California DMV's website and download a bill of sale.This is a tutorial on the California residential purchase agreement. A California motor vehicle bill of sale is part of the vehicle registration process. Use a free template to write your own bill of sale. Step 1: Write the make, model, and year of the vehicle involved in the transaction. A vehicle sales agreement is a lawful arrangement summarizing the terms and conditions of a vehicle sale between a customer and a seller. Below, we've outlined the steps and forms required for how to sell a car in the state of California so you can sell your car quickly for the most cash.