This Addendum is used when the Seller is financing all or a part of the purchase price. 26-8 Redline 11.2022.Discover seller financing in Texas, key legal documents, compliance tips, and how a real estate lawyer ensures smooth property transactions. We'll discuss seller financing for business and how it works, as well as highlight the pros and cons for both buyers and sellers. A real estate purchase agreement with seller financing should include: Seller and Buyer must agree on the purchase price and down payment. Get the landlord subordination agreement at the time of the sale. An Asset Purchase Agreement is a legally binding contract between a buyer and a seller that details the terms and conditions of the sale of a business's assets. Typically, this involves two documents: a financing agreement (basically a loan document outlining the details and terms of the loan) and a promissory note.