The Real Estate Broker who represents the seller. The Listing Agent in most instances – but not all! – lists the property on the Multiple Listing Service. There are a handful of real estate firms, like Quill Realty in Seattle, that “list” properties on other web sites but not the MLS. By skipping the MLS, these brokers don’t have to offer a selling office commission so they save 3%. Essentially, Quill provides an “FSBO Plus” service, where the “plus” is a real estate professional.