Flat-Fee MLS is exactly what its word says.
Instead of paying your real estate agent 6-7% of the sales price of your home, you agree to pay the flat listing fee to get their help listing your home on MLS service that only realtors have accessed.
So, no matter what your home sells for, the amount you pay REDBO stays the same with the flat fee MLS listing. It's guaranteed no listing agent's commission.