Hmmm. 200$ is very low for a new build. You maybe better buying a used PC off eBay.
If you do build new, this is about the best you could do.
PSU: Corsair 430W Builder Series CX 80+ Bronze
MOBO: MSI 760GM-P23-FX
CPU: AMD Athlon II X4 640
RAM: Kingston 4GB HyperX Genesis DDR3 1600MHz DIMM...