Salvaged build for around $200-300 (Already have some parts)

So my friend recently had his laptop die on him. So hes looking for a really bare bones PC that will run basic stuff. I've contributed my old video card and ram and hes using his old HDD from his laptop and hes just gonna use a universal converter to slap it into this new machine. So this is what we currently have.

Video Card: EVGA GTX 275
Memory: Kingston HyperX 1333 2x2GB DDR3 RAM
HDD: 320GB 5400 RPM not sure on the brand.

Approximate Purchase Date: Within the next month

Budget Range: 200-300

System Usage from Most to Least Important: It just needs to work.

Parts Not Required: keyboard, mouse, OS, Graphics Card. HDD, RAM

Preferred Website(s) for Parts: Newegg

Country: USA

Parts Preferences: Whatever is cheapest and working

Overclocking: No

SLI or Crossfire: No

Monitor Resolution: 1280x720. He's used to small laptop screens so he says this is more then enough for him.

Additional Comments: The monitor can be considered separate, because he's not sure if he needs one, he might be able to get one for free, but he would like the option there. We're really trying to keep this as low as possible, he currently has ~200 saved, and hes getting his next paycheck soon, but he doesn't get to keep much of his paycheck so keeping as far under 300 as possible would be for the best so he can get it sooner.