Seller financing allows business buyers and sellers to remove the middleman (bankers) and work together directly to come up with a funding deal. Seller financing: Under this contract, the seller consents to get paid in installments, frequently with interest.A prudent buyer's agent preparing a purchase agreement calling for seller financing will have their buyer fill out a credit application prior to. Typically, this involves two documents: a financing agreement (basically a loan document outlining the details and terms of the loan) and a promissory note.