If you google, you'll have lots of biased answers on the subject, and I'm sure mine will be seen as biased, as well, but it's based on facts.
Roughly 89% of home buyers/seller work with a Realtor to buyer or sell. This gives a seller working with a Realtor a HUGE edge on the FSBO competition. Realtors are matching buyers to sellers everyday using our proprietary MLS platforms. Will we see your FSBO ad? Maybe, maybe not. Less than 10% of FSBOers will success, and of those who are successful, over 1/3rd of them are simply selling to a friend or family member. That doesn't leave much of a chance that you'll be a success stories for people who see the sign or an ad and show up at your door with a check in hand. Are you a gambler?
There is a lot that goes into selling a home. Market analysis for the right price, staging for the buyers who are searching in your market, legal disclosures that are required by law, advertising (you'll have to work a lot harder, our ad machine is already churching when we set your home into it, you're starting from scratch), the contract itself (is it in your best interest?), negotiation... and the fact is, the FSBOer is a bargain shopper, trying to save the commission and probably unprepared, and that attracts bargain shoppers, who are also going to be unprepared. There is also a safety issue: Is that guy walking through your master bedroom a legitimate serious home buyer, or is he looking for "stuff" he can come back later for while you're at work?
I wouldn't do it.