dailypress - 1:30 am on Dec 18, 2010 (gmt 0)
there are several domain appraisal websites and forums. I dont trust either of them but I still browse the sites, read and like to hear what others think my domains are worth. Sometimes you get good pointers. It wont hurt... give it a try.
Latonas.com has had over 1000+ .co: check them out too.
Check Sedo to compare prices and pay attention to the names that sold, not solely listed.