I would recommend staying

[babgvant]

I would recommend staying away from a system based on ancient hardware.  Given the budget I can understand the motivation, but you don’t need to shoot so low to achieve that.  Based on the requirements I’ve put together two sample systems – please note that this is very “back of the envelop” I put no effort into vetting the quality of the individual components (that said, mobo selection is probably the only thing I’d really worry about in the list).

SNB:

	Model	Cost
Case	Rosewill R379-M	$50
Board	ASRock H61M-GE LGA	$70
CPU	Intel Pentium G620	$78
dGPU	N/A	$0
RAM	G.SKILL NS 4GB (2 x 2GB)	$30
ODD	LITE-ON iHAS124-04	$19
PSU	N/A	$0
HD	WD Caviar Blue WD3200AAJS	$42
	Total	$289

Llano:

	Model	Cost
Case	Rosewill R379-M	$50
Board	ASRock A75M-HVS	$70
CPU	AMD A6-3650	120
dGPU	N/A	$0
RAM	G.SKILL NS 4GB (2 x 2GB)	$30
ODD	LITE-ON iHAS124-04	$19
PSU	N/A	$0
HD	WD Caviar Blue WD3200AAJS	$42
	Total	$331