If you own a web site, dnScoop is an interesting tool to get the appraised value of your web site.
Digg.com posts, “dnScoop is a many domain tools wrapped into one convent package. A domain traffic tool, a domain whois tool, a domain history, a domain popularity, domain appraisal (site value report), a link value appraisal (link value report), pagerank check, an inbound links count, an indexed pages check and more.”