I sold a townhouse in DC using a company that listed in the MLS for a flat fee (I think it was about $200). I held my own open house and got my target price from a buyer I met there. He did have an agent but I told them I wasn’t paying any commission. The agent thought I didn’t know what I was doing and tried to sneak a commission onto the sales contract. Typical real estate agent behavior. (I had sold and bought a few houses before, using agents, so I was familiar with the process, and aware that the agents added no value.)
She just put it right there in the contract, despite our verbal agreement that it would not be there. When I objected she made a show of having made a “mistake”. Quite crude, in fact.