A Maryland residential purchase agreement is a contract that binds a buyer and a seller for the sale and transfer of real estate. This video provides a step-by-step guide on how to fill out Maryland's Residential Contract of Sale form.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. A Maryland real estate contract, often referred to as a residential purchase and sale agreement, is a contract that is negotiated between a buyer and a seller. Get a comprehensive understanding of Maryland real estate purchase and sale agreements with our indepth overview and free template.