What exactly makes this worth $2.5k? Let's take a look here.
The site looks poorly designed and the template is nothing special. At first glance, the homepage almost looks like a cheap social bookmarking site! Most of the content on the site is poorly written and would need to be completely redone to make the site more professional and readable for English visitors. Sure, the applications are nice - but they're not worth $2.5k alone. Really, most of them are just simple calculators.
The community also isn't active or worth much either:
Threads: 52, Posts: 128, Members: 93, Active Members: 27
Plus, I see that it's an outdated version of vBulletin. This isn't a major issue, but it could create additional expenses for the buyer that they probably wouldn't think about off the top of their head.
Finally, you said yourself that it's not making anything. This just devalues it more.
So tell me - WHAT makes this worth your asking price?
P.S. Why would anyone use this site over say... http://www.webmd.com/