Looking for a "killer" deal on a perfectly functioning HD 6870, 6850, 5870 or 5850. Any brand. Will also consider less powerful cards but must be HDMI and HDCP compliant, and be able to play most games. I live in the US. This is for my second rig C2D @ 3.2 Ghz and ASUS Maximus MB. Currently have an x850.