I need help /g/, I got this computer for $30, I mainly want to upgrade the PSU, graphics and RAM.

I want to play games such as CS:GO, Starbound and Guild wars 2. I know the CPU work with these games but i have a newer, better CPU laying around, so im not fussed about the CPU.

I have a Budget of $200-$250 AUD

My current PC specs are
Mother Board: Acer EQ35M
Video Card: Intel(R) Q35 Express Chipset Family
CPU: Intel Core 2 Duo CPU E8500 @ 3.16GHz
RAM: 4GB (3.1GB usable)

I have a strict budget since i need to pay bills and i get paid next monday, so can /g/ help me?

Pic is not my computer but mine is the same.