NameBio

NameBio is where you go to find out what domains like yours have actually sold for. It collects reported sales from the major venues, GoDaddy, Sedo, Afternic, NameJet, DropCatch and others, along with public sales reported by brokers and sellers, and lets you search by keyword, TLD, length, date and price.

It's the starting point for any comps research and the fastest way to check whether a price somebody is asking has any relationship to reality. It also settles a lot of arguments.

Know what it doesn't show. Private sales, most broker deals and anything a buyer asked to keep quiet aren't in there, and the biggest end-user sales are often exactly those. NameBio tells you the floor of the market well. The ceiling, less so.