If you are truly making $500/mo, why not keep it and try to develop it further? If you wish to sell, because of the current profit I would say you could bag maybe high $xxxx. The name isn't that good (something I would appraise at mid $xx) but hey, if its getting that many visitors it's definitely doing its job.
Thanks, I found it hard to sell my last arcade website, has around $300/month income and it sold for $320 on sitepoint after 2 days because my topic was falling...
Thanks for all the comments, im saving up for a motorbike which will need to be bought very soon, as i have in England, the dollars are not worth as much as pounds so i would rather sell it then keep getting cheques of revenue.
So what is the lowest i should sell this website for?
However, I had a few questions. Your site has no alexa rank, and when looking at the menu bar stats, had only 3 game plays yesterdays, and I was the only person on at the time. How in the world do you make ~17 dollars a day?