The easiest way to create a Business Purchase Agreement is to use a template that is customized to your state. Get your business purchase agreement form template now and ensure your transaction is secure with expert tips from Moton Legal Group.Explore our guide on business purchase agreement PDFs, covering all you need to know from drafting to common mistakes. A business purchase agreement (BPA) is a legal document between a buyer to acquire the full ownership of an entity from a seller for a sales price. Many standard forms are available below. All forms are categorized into their respective departments.