Value of the Proxy?

[JRBHosting]

Lets say that I have a proxy which averages 15k pageviews per day. How much would you guesstimate that I would be able to get for the domain (with or without proxy script included)? Is this a matter of revenue (I have found that proxies are hard to monetize...if you have an idea bout that, shoot me a PM about it) times 'x' months, or just plain traffic?

Thanks

Jason