First Gen Phenoms are notorious for being bad processors.
You're going to have to pay people to take them.
The 2900XT was an awesome card, but is way outdated now.
DDR2 is quickly becoming a thing of the past.
I just bought a re certified Seagate 500BG drive for $25
Motherboard is probably the only thing you got going.
If you're expecting me to say $400, then Imma have to tell you that for $400, I can build myself a brand new computer.
I have an Intel Q8200 system with two WD 320s in RAID-0, Windows 7 Home, 8 gigs of ram, and HD 3870 that I'm trying to pawn off for $400, and nobody wants it.
Its less than a year old and is probably worth $700, but with the new chipsets and hard ware coming out, the price for computers has really taken a nose dive.
Try pawning it off to someone who doesn't know anything about computer. That's what I try doing, but I can't find anyone who has any money.