I feel the backlinks and potential are worth $400 to $800 as it exist. You really need to get traffic and revenue. Typically an established site market evaluation should be a minimum of 12 months revenue (from a sellers perspective). Your domain name is valued at $448 at www{dot}leapfish{dot}com. I would also change the pink to a more neutral web site friendly color. Nice site...
To get a site that popular you really need to give it a lot of time, which I'm sure you did. I can surely say it's worth from 500 to 1000 USD.
I myself honestly pay $500-$100 because of the traffic with that traffic you can make it a redirection to another site and make the money you spent for the site and more. Believe me that site is worth $500-$1000
Ok, well to sum it all up for you friend. I know you might be confused... You site is worth something over $450. Anything higher is depended on the buyer. And that is the minimum value. Cheers, neverstudy