Sold without agent as I found agents slow, unhelpful and only out for fast buck.
Advertised in Local paper, and put up a sign out front. Was in a hurry to sell so I contacted several agents as well, and said if they brought buyers they could earn the commision. Two of the biggest told me that I could not do that as ALL agents in my city had agreed to boycott anyone that advertised in the local paper. Went to a smaller firm and was happy to be told he would also list my house, no fear, if i sold it to my buyer I could keep the commision. Thats the way it should be.
I got several lookers, a few bidders (all less than asking price). In the end I took an offer about half a percent less than my asking price and was able to sell within 8 weeks during a fairly slow period of the year.
If you are the kind of person that can deal with selling a car through an ad in the paper, then you can sell your house. Using an agent is purely for saving time and not having to deal directly with hassle of purchasers. (missed appointments, people out for a look, people that criticize your home in front of you, low bidding chancers, etc)
I would do it again next time, or at least give it a try first as long as the market is strong and im not in a big hurry.