A purchase and sale agreement can be amended or extended in writing. For example, the loan commitment date is set forth in a purchase and sale agreement.You should go to a lawyer and get an actual contract filled out, there is no "simple purchase agreement" for land or a home. This Master Sales Agreement (the "Agreement") is entered into between the buyer listed on the applicable Purchase Order ("Buyer") and Calimetrix, LLC. Closing Documents. 1. Quitclaim Deed from Seller to Buyer recorded on February 25, 2021 in the Middlesex. In a private sale, have the seller make out a bill of sale in addition to the ownership and sales tax documents. Next Section. Continue. This agreement, the lease, can either be oral or memorialized in writing. This resource includes provisions related to ordering procedure, shipment, price, payment, product warranty, limitation of liability, and indemnification.