There are actually A LOT of websites that could help you sell your domain names. Please note that I do NOT endorse any of these since I have NOT dealt (I mean actually transacting with money) with them myself:
AfterNIC.com now under new management, or to be more acurate, NameBuySell.com bought the domain name from Register.com. I have sold only 1 name with the OLD AfterNIC.com, not a very smooth transaction I must say, and I have not yet signed up with the new one.
Sedo.co.uk/.de/.us covers mainly the European market; they got some good sales like eCasino.com (US$25,000) and dj.net (US$45,000). I once listed some names over there; never had any enquiry, so I delisted them all a couple of weeks ago and concentrate on my own site.
I HAD some good experience with GreatDomains.com, but they have folded their retail business as of January this year.
Hope this helps.
Profoundly influenced by #Bauhaus, @Nameslave
unrepentantly embraces #Minimalism in his #multimedia portfolio. His early works include an experimental adaptation of Chekhov’s Cherry Orchard
inspired at least partly by Robert Fripp. His totally irrelevant M.Ed. dissertation examines Organizational Culture and Change Management.