I have a site that does about a 150,000 pageviews and 5,000 uniques a day. It is profitable, making about $50,000 a year, not from adverts. The average pageviews per visit is over 30.
At the current growth trend I would expect it to be making over $150,000 in a couple years. It is also an influential site for its niche, market leader in its own right.
It comes top of google for any keywords pertaining to the market it targets.
What do you think is a good price?