A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price. Download our free blank purchase agreement template in Word or PDF format: sample real estate purchase agreement template.A purchase agreement is a form used for making an offer on a home. It contains a set of conditions and contingencies that are presented to the seller of a home. A Massachusetts purchase agreement is the standard legal form for selling or purchasing a home. It documents the transaction's stipulations. Massachusetts Free Payment Plan Agreement Template. Use our Payment Plan Agreement to set up an installment plan between a lender and a borrower. A purchase agreement is most commonly used to create a transaction between a buyer and a seller of residential real estate. "SELLER," agrees to sell and.