These forms are also available in the DotLoop and DocuSign form libraries. I'd like to hear comments on how to make my offer more attractive.An agreement to sell real estate, or a purchase agreement, is a legally enforceable document that specifies the terms of a real estate transaction. EXHIBIT 7 CITY OF CHICAGO SAMPLE PROFESSIONAL SERVICES AGREEMENT Specification Number Contract Number Requisition Number Vendor Number NAR offers a number of other forms to members and association staff which are not transaction-related: Real Estate Business Letter Templates.