can you explain me a bit more, i have heard about it, but don't know excatly what it means! thanks for your help. and what are the tool you are talking about!
Tools like: http://www.dnscoop.com/ Website appraisal is the estimate value of your site if you were to sell it. This depends on various factors such as: PR, visitors (uniques), content, value of domain, etc. Most "tools" miss these factors so they're not accurate at all! Its best to get it appraised by a HUMAN rather than a generator...
I have heard of Domain Appraisal on DP, They appraise your domains and gives you a estimate price of your domain
Friend told me about that but i dunno how such sites work, it estimated my sites value to be 2.5K + and per month link rate to be 19$ per month alone