The flat fee MLS listing is a listing that will appear in the Multiple Listing Service just as any property listing appears. It is extremely important when selecting a flat fee service to verify that your listing will appear on the MLS. You may want to ask if there is an additional charge for an MLS listing or if it is part of your listing package.
There are many For Sale by Owner or Be Your Own Broker websites that list your home for sale on their company website only. The sale of your home is then dependent upon how much traffic is driven to that site. You are essentially trusting in the company's Search Engine Optimization knowledge and marketing efforts and missing out on the huge pool of buyers available through the MLS.
By listing your home on the MLS (Multiple Listing Service), your home is not only easily found by Realtors, you will also receive exposure on Zillow, Trulia, Realtor.com and hudreds of other sites.
As stated in a previous blog, it is all about exposure.