You've probably run across dozens of articles telling you that if you want to cut costs when selling your home, try negotiating down your agent's commission fee. However, contrary to popular belief, you can't really haggle with real estate agents on this fee in most situations.

That's according to a new report from the Consumer Federation of America, which had conversations with over 200 real estate agents in 20 U.S. cities. The consumer advocacy organization studied over 260 real estate agent and broker websites in four U.S. cities, as well as surveyed over 2,000 Americans on their home buying and selling perceptions.