Seller agrees to sell to Buyer, and Buyer agrees to purchase from Seller, subject to the terms, covenants and conditions set forth herein. Buying or selling a business can determine your future.Make sure it is sound. Purchaser shall deliver to Escrow Holder a Preliminary Change of Ownership Report completed in the manner required in Contra Costa County. Use a California business purchase agreement to record the sale of a business. Download your free template today. The following is a list of some documents that may be recorded if they meet all requirements, and a description or definition of each document. It also indicates your eligibility for business opportunity programs. Instructions for completing registration can be found in the link below.