Parties: the "SELLER," agrees to sell and. , the "BUYER," agrees to buy, the premises described in paragraph 2 on the terms set forth below.Use this form to change or amend terms of the Purchase and Sale agreement after it has been signed. A Massachusetts purchase agreement is the standard legal form for selling or purchasing a home. It documents the transaction's stipulations. It lays out the framework for a conveyance (a real estate transfer) in Massachusetts. This Agreement can be executed in separate parts and signed through electronic delivery. 3. Property. Fill out the street (physical) address of the property the buyer is purchasing. Include any unit or apartment number, if applicable. This law mandates that specific types of agreements, including those pertaining to property sales, must be documented in writing to be legally enforceable.