If you want to try the Performance Carbon 08's on the cheap, consider these.
I thought they were awesome. Sold the car so don't need them.
The fronts have some cracks; I don't know how big a deal that is.
All have at least 10mm of pad left. I machined the backing plates on the fronts to mount the wear sensors; they don't come able to fit them.
$100 for all four corners, plus shipping (max shipping = $25)