Flat Fee MLS Service for Sellers adds an MLS listing to your For Sale By Owner real estate listing.With Flat Fee MLS you can list your property in the Multiple Listing Service with a flat fee MLS listing For One Low Flat Fee. For Sale By Owner Homes in your local Realtors MLS For a Flat Fee MLS Listing charge of $299-499 using the largest online Discount Realty MLS Real Estate listings service. National Directory of experienced best Flat Fee MLS Discount Realtors to help FSBO home sellers. Realtor.com is not the MLS. You must have a local broker list in your local MLS for local agents to see it. It then uploads into Realtor.com. Get both local MLS and Realtor.com with Flat Fee MLS.