Personally, I wouldn't do it.
One of the other things Realtors do is screen people. You're not likely to have to waste your time on people that are dishonest, unqualified or just curious. Unless you figure out some kind of friendly but reliable way to weed-out the riff-raff, you'll have to show your home to anybody who talks a semi-decent game.
Plus, time is money. I would think that you'd be much more likely to sell quickly with an agent.
I suppose you could give it a go and if it doesn't work out, you could find a Realtor later.
