We have a pristine, red 2008 GXP with only 13K miles going through our upgrade program to benefit the Phoenix Children's Hospital. See thread below and scroll to the end to see info about this car. It will have the 400 hp Stage 3.5 package from RPM-Motorsports, full suspension, etc.
Photo below -- LS2 Werks 6-speed in front and GXP Coupe auto beside it. Yellow GXP auto being listed this week. Red Coupe goes in for wheels and tires today. They're all a hoot to drive.