If you are able to advise yourself on preparing the property to compete on the open market, want to take the phone calls and make all the appointments to show, listen to the opinions of the prospective buyers, counter their objections into a positives light, sell the location, sell the school district, know how to answer questions about fair housing laws, loans, crime in the area and can negotiate the highest and best price for the property yourself, then it might work for you to use a fee for service method of selling the most expensive, highest worth asset most of us will ever sell.
As Eric Mangan stated, not all FSBO websites are created equal. Doing a little up front research to ensure you are getting the best overall value for your effort will be well worth the time.
Anyways, it seems legitimate. You can post a listing online for free. I will provide the link if anyone is interested.
If you need more specific information, please feel free to contact me at IMcCarthy@weichert.com or (302) 225-5730. Hope this helps!