Mmorpgspot.net Created for 3 months now Threads: 6,605, Posts: 63,578, Members: 15,108 Never really tried advertising. 15000 impressions - 3000-4000 UV Daily
If it has no revenue - it's very hard to tell the price ! Buyer will ask you "how much I will earn from it ?" - what you will answer ? "Sorry dude - nothing !" ?
First try to monetize the site..and see how it goes a couple of weeks,..then, you can estimate it's value.