Last month I got a set for myself from Kijiji for an amazing price of $250 total. They are genuine GM Z06/Gs quaters. I am writing to advise you that if possible, find GM ones as the aftermarket can taker a lot of work to fit properly. I know of guys that spent over $1k even $2k of fiberglass work to get aftermarket quarters to line up properly. Front fender kits are even worse. A car that I looked at for sale had a $8k USD wide body kit and it took him 80 hours of fiberglass work himself. It still had bad gaps and even stuck out from the head lights.