A.E.
I think it depends on who is buying the house. We almost purchased a home from one of those Home Vestors people and they told us that if we wanted to have our agent work with them about the deal that the price would go up to include commission they'd be giving up. We asked our agent his advice (he's also my uncle) and said that as long we were using a company that does this regularly it would probably be fine as long as we checked over everything. Someone else in 'the business' said that if we were uneasy about it that we could ask an agent to look over the contract for a flat rate. The deal fell through because someone made an offer literally an hour before us, but we were planning to just do it ourselves & get my uncle to check over things if we started to feel uncomfortable.
I guess what I'm saying is that if you feel comfortable doing it without an agent, save yourself some money. Or, see if you could get an agent to look over the contract for a reduced rate or just a nice gift (especially if it's someone you know). If you're selling it as is, I would think that using an agent would just be giving up money for no good reason.
Sorry, my SIL & her mom are agents & I seriously believe they are worst than used car salesmen (sorry guys). . . . say anything to make a buck! Not all of them are like that (my uncle for example) but so many are that I would do it myself if I could avoid using an agent.