For some real estate professionals, unfortunately, FSBO stands for "Flag, Stalk, Bully and Outsmart." If you are listing your property on your own, be clear that you are open to direct sales only by punctuating your ads with the phrase, "No Brokers, Please."
Beware of agents who will call you anyway, pretending to represent a buyer. They may be—but more likely they are looking to get their foot in the door and convince you to list the house with them.
Another salesperson gambit is to undermine your confidence in your ability to competently do the deal. An agent will tell you the house is priced too low, then promise that he can do better. Hire an appraiser at the beginning of the process and you will price your house right.