I have two there and have had several rejected. Frankly, one of the two is not worh anything like Great Domains valuation, as I had registered it immediately previous. Even if you manage to get your domain regisitered, I doubt if you will ever hear anymore. If you want to know who sells domains then go to:
DNjournal is updated each Wednesday. It is not totally comphrensive as nobody can know the unknowable, but it is a good attempt and the best available of tracking domain sales.
What isn't really clear from this is that more and more domains are being transacted by buyer's who-ising the domain they want and making a direct offer. If this happens to you either accept payment by Paypal before transferring or make the buyer go via Escrow.com.
By and large selling domains is a waiting game. You buy and then wait for somebody else to decide that is the only name for them. Can take a long time and will only ever happen if you buy wisely!
I had sold more than $10,000 worth of domains there (GreatDomains.com), but that was BEFORE they changed their business model. Now I still have *some* domains listed there and am waiting for my jackpot.
Have 2 names there for 3 months now but no offers , course that don't mean anything in the name biz , they have sold some big names so I don't think it can hurt to have them listed there.