I used greatdomains but i didnt sold the domain for over 6 months now. i just used them as a test.They send me e-mail every week or two with big news,improvements, cooperations with major companies etc so I belive they can be trusted.But you should read FAQs and info how much they take for themselves and simmilar. GD was the only domain selling service that i knew since i never really sell domain(s).
9:58 pm on Jan 11, 2001 (gmt 0)
Greatdomains seems to make all the press, so I expect they have the most traffic. Don't expect much action, however. I'd be tempted to use ebay and set a reserve.