Hmm well you could hit it easy with a nice 754 comp... I'd try for a s939, but if worse come to worse the s754 won't be dead tomorrow, so it's not a bad choice.
Mobo, abit's sopposed to have some pretty good oc'ing options.
Not bad, like someone else said, the yellow one is only $46.
Someone else suggested it, seems pretty good.
Corsair value ram, 1gb stick
Maxtor 100GB SATA HD
not bad for $60.
Now, based on shipping you could get;
It's OEM tho so you'll need a heatsink.
Not a bad proc, but if you still need cheaper...
Only $100, so you get left with about $30 for shipping.
Hope that helps.