I have a 7800GS (it's AGP) and no reason to keep it. I'll sell it for $100 USD. It's a pretty good card, far too damned expensive in retail (around $160 online, and probably $2500 at best buy), and fairly fast from what I understand.
It's a working card, afaik nothing is wrong with it. It has VGA, DVI, and what I believe is an S-video port out the back. System requirements say minimum 350W power supply, and the power connector is a standard, run of the mill, 4-pin molex connector.
If shipping kills it, just send it back to me and I'll wire you back your money.

Also, if your power supply can't handle it I have one right next to me that's a 500W ATX PSU from Arrow that I'll throw in for $20. It's got 8 molex connectors off of it... no SATA or PCI-e connectors on it either.
Shipping is like, $5 or something for US residents. USPS is cheap so I'm not going to bother charging you for it.
If any of you foreign devils want to have it shipped to you. You're going to pay for shipping, and you'll need to tell me how to get it to you since I've never dealt with international shipping... all I know is it's expensive, and I'll probably be taxed on it.
Edit: I'll post pictures tonight when I get home