$timator is a online service which can estimate the real value of your website. The service says that their engines deliveries the most accurate economical value that a website could worth by collecting important data from different sources. All you need to do is to enter the website URL to be valued and it checks various parameters before showing the value of the website.
The results are based on TLD, Search engines, traffic, popularity, links, social score and also web volume and various other financial factors.
Stimator says that calculations are made to give what is called the economic value, but the results are too high. This tool can be used probably to see how you value with your competition.