this is a great deal on an open box ASUS P5Q board, probably about $80 including shipping...
ASUS P5Q
for a good deal on a video card, I would go for this $80 (with promo code and free shipping) 8800GTS 320MB...
8800GTS 320MB
your PSU may not be able to handle that system though with only 21 amps on one rail...