How to Spot Fake PS3 Controllers, DualShock 3 - YouTube
How to Spot a Fake PS3 Controller Before Opening the Packaging - YouTube
Spotting a Fake PS3 Dualshock Controller
OEM PS3 DUAL SHOCK 3 CONTROLLER METALLIC GOLD RARE ORIGINAL SEALED PLAYSTATION | 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 :
Restored PlayStation 3 Dualshock Black Controller (Refurbished) - Walmart.com
Genuine Sony Playstation 3 PS3 authentic OEM Dualshock 3 Sixaxis controller | eBay
Amazon.com: PS3 DualShock 3 Wireless Controller Cola Red : Video Games
Amazon.com: Sony Playstation PS3 Dualshock 3 Controller - Blue (99007) : Video Games
Real or fake Dualshock 3? : r/PS3
Amazon.com: Playstation 3 Dualshock 3 Wireless Controller (Black) (Renewed) : Video Games