oddsod - 6:48 pm on Apr 7, 2011 (gmt 0)
I own a valuation site.
I won't tell you which one (and it's not in my profile), but it's the closest you can get to an accurate value.
Should you arrive at my valuation site, do a valuation, read what it says and throw that figure away!
No valuation site is going to tell you anything useful about your site's value. In fact, there isn't one value for your site - every potential buyer out there likely has a different figure in his mind as the maximum price he'll pay for your site.
If you're looking to sell your site find out the best way to get that buyer who has the highest valuation and the best way to get him to bid to his limit.