Sony Playstation 3 PS3 Sixaxis DualShock 3 Controller Black Genuine OEM Original – ASA College: Florida
Original Dualshock 3 OEM Playstation 3 Wireless Red Controller PS3 Genuine | eBay
Original Dualshock 3 OEM Playstation 3 Wireless Red Controller PS3 Genuine Works | eBay
Amazon.com: PS3 DualShock 3 Wireless Controller - Jungle Green : Video Games
How to Spot a Fake PS3 Controller Before Opening the Packaging - YouTube
Original Dualshock 3 OEM Playstation 3 CECH2C2U Blue Controller PS3 Untested – ASA College: Florida
Official Sony PlayStation 3 PS3 Controller OEM Original Authentic TESTED | eBay
I bought a sealed dualshock 3 and it's genuine (tested with MGS HD collection) so I figured maybe it can help you as a reference when looking for original ones online :
Amazon.com: PS3 Dualshock 3 wireless controller - White : Video Games
Sony Playstation 3 Dualshock 3 Controller - Black - Walmart.com