A real estate marketing agreement is a strategic union between a real estate broker or a developer and a mortgage or title company. The updated Exclusive Buyer Agency Agreement form is available in New Jersey Realtors® forms library.Click here to view the form. The property and improvements which the Seller is agreeing to sell and which the Purchaser is agreeing to purchase is known as. A real estate contract spells out all the details for one of the biggest purchases of your life. It contains the purchase price, closing date and details.