Purchase and Sale Agreement. A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price.OFFER: A. THIS IS AN OFFER FROM________________________________________________________________________("Buyer"). A California purchase agreement contains all the provisions, disclosures, and general information needed to secure a binding contract. With our free Sales Agreement form, you'll be ready to print or download your contract in no time. How to fill out the California Residential Purchase Agreement and Instructions? Get a comprehensive understanding of California real estate purchase and sale agreements with our indepth overview and free template. This document includes the property description, purchase price, financing options, earnest money deposit, closing date, and necessary inspections.