Purchaser agrees to use diligent efforts to obtain said approval and shall apply for the mortgage loan within business days after the Seller has accepted this. A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price.With our free Sales Agreement form, you'll be ready to print or download your contract in no time. What form(s) do I need to fill out? What document(s) do I need to bring? Download our most commonly requested forms.