Here is my list of forums and sites about selling and buying domains and sites. Take some time to read, and to ask for some appraisals:
DNforum.com
NamePros.com
Domainstate.com
NameMatters.com
DomainHabit.com
Nameslot.com
Realdn.com
Dnboard.com
Websitebroker.com
Discussnames.com
Nameforums.net
These are just some that are on my bookmarks. Good luck!