Plenty of places to sell yep.
http://websitebroker.com/ used to be a decent site for offering services but I think it was neglected so it may not be so effective now.
http://dnforum.com is also popular as is the marketplace at
http://www.sitepoint.com/forums/forumdisplay.php?f=49
This place used to work well also and I believe it was recently taken over by new people:
http://creabiz.com/