hmm, just so you can know, here are the part of a "low-cost" computer i bought myself a few months ago :
Intel E5200 @ 2.5Ghz - 59 €
MSI P31 S775 - 54€
2 x 1Go G.Skill DDR2 PC6400 - 40 €
ATI Radeon HD3850 - 90 €
Samsung F1 320Go - ~55€
Total : 298€
then i bought a 40€ case with a 300W power supply, and it's working just fine
I don't really know the prices in dollar though, but they must be around the same...
Intel E5200 @ 2.5Ghz - 59 €
MSI P31 S775 - 54€
2 x 1Go G.Skill DDR2 PC6400 - 40 €
ATI Radeon HD3850 - 90 €
Samsung F1 320Go - ~55€
Total : 298€
then i bought a 40€ case with a 300W power supply, and it's working just fine

I don't really know the prices in dollar though, but they must be around the same...
