Learn how Buyer Broker Agreements are intended to be used and what you need to mention directly within the agreements. A listing agreement is a legally binding contract between a homeowner and the real estate agent or broker who will be listing the property for sale.Flat Fee MLS Listing West Palm Beach Florida. This is a six month exclusive right of sale listing agreement should be enough time hopefully for you guys to get your property sold. The listing agreement is a contract that lays out specific, agreedupon terms, giving the real estate agent permission to market a home to buyers.