This document terms as the source for defining all the terms and conditions that are required while setting up a sale and purchase of a car. A master purchase agreement is a legally binding contract between buyer and seller, and typically relates to buying and selling goods rather than services.By signing this contract, I choose to purchase the motor vehicle on credit according to the terms of this contract. This car purchase agreement template is a standard agreement made completely customizable for your individual needs. A vehicle sales agreement is a lawful arrangement summarizing the terms and conditions of a vehicle sale between a customer and a seller. 2. Odometer Declaration. (Pro-Buyer) (5-541-6567). For a sample pro-seller master sale of goods agreement, see Standard Document, Sale of Goods. Non-Recourse Dealer Retail Agreement. Documentation showing the tax collected per lease payment may be in the form of a statement from the lessor or a copy of the lease agreement.