Amazon.com: Dualshock 3 Wireless Controller for Ps3 Charcoal Black : Video Games
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 :
How to Spot Fake PS3 Controllers, DualShock 3 - YouTube
Amazon.com: PlayStation 3 Dualshock 3 Wireless Controller (Black) : Video Games
How to Connect PS3 Controller (Original/Fake) or Dualshock 4 to your PC | Kunmi's Space
10x Ways to spot Fake PS3 DualShock 3 Controller including Packaging (Before & After Buying) - YouTube
Original Sony PS3 Dualshock 3 joystick
Refurbished Sony Playstation DualShock 3 - Delfino Customs
PlayStation 3 - Wikipedia
Sony DualShock 3 - Gamepad - 12 buttons - wireless - for Sony PlayStation 3 - Walmart.com