New cheap build for mate. Gaming pc.

Hello, looking to build the cheapest PC I can for a mate that would run bf3 at about medium settings, this is what I'm looking at so far..

Motherboard as rock b75m r2. $64
4gig g skill ram add more later $23
CPU intel i3 3220. $120
Gfx card I have a 7750 spare.
A power megaton x2 case
+ 750w psu (sceptical). $33
Ssd $65

He has a hard drive he wants to keep, he knows nothing about computers so no over locking will be done, just looking to turn on and play. Am I missing anything. Price is important but so is the ability for the system to play games at medium settings. How does it look for a massive budget build. Total comes to $287. Pretty decent for the price?