Lots.

It's kind of hard to tell, valuating an already impressive and expensive domain can be a long drawn-out research process.

Make sure it isn't a scam, though.

But, you just can't get 2 character dot com domains anymore. The number devalues it a bit, and the fact that it is a 4 is bad for China... 4 means death and the Chinese are very numerically superstitious (8's are good luck).

However, in English you can interpret "4" to mean "for", and this can be a selling point in an English market.

-Doug