I am considering purchasing a web site that has been online since 1999 and has a Google PR of 6. The web site is not monetized and has about 150 organic and unique visitors per day. The web site ihas not been SEO'd, yet lists in the top 4 pages for a highly competitive and popular keyword, which indicates oportunity to me. The web site only has 10-15 pages but all are indexed by Google. There are over 1200 incoming links, including over 60 from EDU sites. How much, approximately, would you value such a web site and why? Thank you.