I wouldn't give it more than $100-$150 value. The asia extension damages it imho. Good layout and structure though and some activity do give it value. If you are earning solid revenue of course that's going to raise value too.
according to mywebsiteworth.com your site worth's only $10 http://mywebsiteworth.com/site/bigbuddy.asia
Pagerank of 0 and not on the Alexa map... and though these things don't mean a lot except to prove that a site is getting little or no traffic. So I'd say the site is worth whatever you paid for the domain.