brotherhood_of_LAN - 11:28 am on Jul 13, 2011 (gmt 0)

There's no cast-iron formula

>85-90% through search engines.

This would be perceived as risky. From what I've saw (which ain't too much but the thread pops up often on here), 3-5 times earnings is a rough ballpark, so $3-$5K.

That's not to say that someone could monetize it much better than what you are already doing with Adsense, and value it higher.

Somewhat related threads [google.com] might yield some useful info.