Download the Real Estate Buyout Agreement template. 2. Fill in the relevant details such as buyer, seller, and property information.Ensure you know the legal requirements and disclosures of a Washington real estate purchase agreement. Fill in our template to create your agreement. A Washington purchase agreement documents the sale of a piece of real property for a specified financial figure. A buyout agreement is a binding contract between business partners that establishes the buyout details of one partner exiting the partnership.