An attorney who is experienced with business buy-sell agreements to protect your rights and limit your liabilities. Use a California business purchase agreement to record the sale of a business.Download your free template today. This article discusses seven (7) types of seller liabilities that should concern a buyer when negotiating the purchase of a California business. Sell Agreement is important when running a business. The Buy-Sell Agreement is a binding contract between business owners. Buy-sell agreements are a key component of any business. Some of the most talented Los Angeles business purchase and sale lawyers in the state of California.