suggestions for a cheap gaming computer

I'm looking for a new gaming computer, but i can't really find one that is cheap. Could I get a few suggestions that could point me in the right direction?

The computer will be used for school work as well, but it will mostly be used for gaming. I won't be running anything too insane like Crysis 3 mostly just Minecraft, Arma, battlefield and thing like that. but if it can handle heavy loads that would be appreciated.

my budget is around $600 to $900

i dont care how it looks only how it runs but if it looks good its always a plus

thanks in advance