Flat Fee MLS Listing Salt Lake City Utah. Discover the benefits of buying or selling a house without an agent and avoid paying hefty commissions.Utah requires those selling FSBO to fill out and file many documents and forms. Several of these documents are legally binding agreements. This is a legally binding Real Estate Purchase Contract ("REPC"). Utah law requires real estate licensees to use this form. To help you prepare the paperwork for selling a house without a realtor, here is a list of 12 musthave documents. Below is a list of common questions and answers related to For Sale By Owner transactions. For information about our Flat Fee FSBO services, click here. KSL Homes looks at the pros and cons of selling on your own instead of relying on a real estate agent.