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.1.1. Sale of Property. The document is an agreement for sale between Ms. Sowmya Lakshmi (Vendor) and Mr. A.C. Hari Prasad (Purchaser). A California purchase agreement contains all the provisions, disclosures, and general information needed to secure a binding contract. OFFER: A. THIS IS AN OFFER FROM________________________________________________________________________("Buyer"). A For Sale By Owner contract California must include: 1. The Purchase Price, 2.