A Maryland purchase agreement records the negotiated terms of a real estate transaction. The buyer or seller can use this form to make an offer.The following is a list of recommended documents sellers should consider having on-hand before you even have an offer. A Maryland residential purchase agreement is a contract that binds a buyer and a seller for the sale and transfer of real estate. Here are the 7 best For Sale By Owner websites in Maryland: 1. You'll need to fill out or obtain at least 14 documents, including the purchase agreement, closing statement, and bill of sale. Edit, sign, and share maryland real estate contract online. No need to install software, just go to DocHub, and sign up instantly and for free. First, include the property address as well as its legal description (found on the deed). Then go into detail about what is included or excluded from the sale.