Have you ever wondered how much does your blog’s domain name costs? dnScoop provides you a service which is the Domain Name Scoop: All in one Domain Check.
Just type in your blog’s URL and category at the main page and click “Check it!”. dnScoop then checks your domain age, pagerank, inbound links, traffic ranks and other statistics. At the end of the page, you will get a Site Value Report like this:
The value of the domain is actually calculated based on the statistics shown before this including pagerank, inbound links, Alexa traffic and so on. So the more popular your blog is, the higher value you will gain for your domain.
The best thing is, you can even sell your domain at their site! I don’t think many people will actually sell their domain name there, unless the price is really very high. For my domain, the value is only $1,332. Anyone want to buy my domain name? 
I bet not.
Go have a check on the value of your domain name and let me know, will ya?
U not only can sell the domain name but also we can know how much is our blog worth.
You can also try http://www.estimix.com – a free tool that provides a nice summary of the website performance.The estimation provided by estimix is the result of a complex analysis based on factors like: the age of the website, the demographic structure of the traffic, the countries where the website is popular and sources of the traffic.