This is an interesting post on Rennlist. Someone gathered data on SC and Carrera sales from 2/03 to present on eBay / Pelican / Rennlist and charted them in Excel, also compared to BA's
Excellence price guide figures. Good stuff. Suggests BA's figures are a little high, as many suspect.
http://forums.rennlist.com/rennforums/showthread.php?s=&threadid=111522
EDIT: DANG IT I posted in wrong forum - moderators feel free to move to 911 Technical Forum, I'm sorry for the inconvenience. I tried to delete the post but couldn't, for some reason.