Fresh Whois gives you an estimated value of your online business by profiling your website for keywords, accessible company stats, and other valuable information. We then compare them to the database of other websites values and sales.

FreshWhoIs.com:

FreshWhoIs.com is a website valuation tool. It scours the web to compare your site to others. This website uses electronic means for analysis.
Selling your website should not be solely based on this analysis as businesses and business models vary from site to site. The value of the business is hypothetical, but can be used to value your site should you wish to sell it or trying to see if investing more is a good idea.
It is up to you to judge the final value of your website.
Again this is just a tool and is not meant to be a final guarantee to the value of your site.