There are agents who work the following model. They list your home for whatever you think it is worth and then begin a campaign to lower your price after 30, then 60, then 90, days go by. At that point you have what is known in our business as a "stale" listing. Everyone has seen it and regarded it's too high price and continued looking at something else. Your home eventually needs to be priced less than it should have been originally. You lose.
It wasn’t to long ago that commissions below the “going rate” for an area were all but unheard of. These days though, there are many brokers and agents willing to list your home for less than the 6% that is typical for the area. They know the value of their service. You need to be aware though, that lower commissions are nearly always tied to lower levels of service. Most agents willing to list your home for a bargain commission rate aren’t going to do any advertising or marketing of your home. They will probably just list it with the local MLS and put a sign in your yard, and that’s about it. Meanwhile, a full service, full rate agent will probably spend considerable time and money to advertise and market your home – particularly to other agents in the area. So, when considering a low commission, be sure you know exactly what you’ll be getting, and what you’ll be giving up.