I had to RMA a 5850 to a company and they didn't have anymore, so they are sending me this ...
ZOTAC GTX560 1GB 256BIT GDDR5 PCIe
You interested?
560!=680

The 680 is a way more powerful card. It's not even the brand he's looking for.
On another note, I've got a gigabyte 680 on hand, what's your offer?