It doesnt seem to have anything to do with site cost. Its more of an info site for only the highest PRs.
my 3 month ols site is 206$ so i have made 200 dollar in 3 months, but problem is no one Wants to Buyyyy
http://www.dnscoop.com/ gave a value of $4,600 for my site, i tested a site i work for and they show $75,000 on http://directory.sootle.com/website-worth/ and a staggering The estimated value of http://student.com is: $308,147,840 on http://www.dnscoop.com/ so how one can make a value of less than 100,000 and the other more that 300 million i have no idea, but one of them is wrong. but i would have thought 3 million would be a good price for it.