A Business Purchase Agreement is a contract that transfers a business entity from its owner to a new buyer. Identify the parties involved in the transaction. 2.How to write a purchase agreement for a business? This agreement includes specifics such as purchase price, the scope of the sale, payment arrangements, and more. A business sale agreement is a legal document that describes and records the price and other details when a business owner sells the business. In this ultimate guide, we will unravel the mysterious world of buyout agreements and show you stepbystep how to navigate them like a pro. What should be included in a buyout agreement? Document how company shares are bought and sold.