If you are looking for ways to evaluate your domains, Domaining.com will be launching Valuate.com for your domain appraisal needs. It is free of course. I tried it when it was in Beta,which has just closed, and the results were nice. They will relaunch soon. I tried to get StateCommunityCollege.com appraised here and so far not one person has given one just like the others domains I've tried to get appraised here. According to them it was valuated at $2,199.00. So just keep an eye out for it when it relaunches.
Which domain are you talking about? None in itself would probable fetch xxxx, IMHO. As an add-on service of a heavy-traffic site this might be different.