I hope this is the right forum for this. I have been getting emailed about people wanting to buy my site, http://www.volconvo.com, and while I really do not plan on selling, I would love to know what it is worth. It has about 143,000 pages indexed by google, it's a PR5, it makes about 50/mo in adsense and 300/mo from text ads. The forum is #1 for the google keyword debate forums and #2 for debate forum. It has 250,000 posts.
At the base of the price would be your revenue earned * 12. So base cost of the website would be 350 * 12 = $4200 . Now, that is not with the extra information provided. The backlinks, pr, keyword ranking, and posts does add value to the over all website. I can tell you the base cost, but never was to good at judging the value of the other things. To me it would be low to mid xx,xxx amount.
Around mid to high xxxx because as exodus said. Revenue of a month X 12 is the normal price + other factors so yeah mid to high IT