Use a California business purchase agreement to record the sale of a business. Download your free template today.1.1. Sale of Property. Explore our guide on business purchase agreement PDFs, covering all you need to know from drafting to common mistakes. This document is a business purchase agreement between two entities. It details the sale of a business from the Seller to the Buyer. A business purchase agreement is a legal contract specifying terms for buying or selling a business, including conditions and obligations. The easiest way to create a Business Purchase Agreement is to use a template that is customized to your state. Here's a step-by-step on creating a business purchase agreement with a free business purchase agreement template.