Joystick On Sony Ps3, In Original Packaging From Sony, Exact Copy, New, Quality Guarantee - Joysticks - AliExpress
Real or fake Dualshock 3? : r/PS3
Original PS3 controller? : r/PS3
Sixaxis - Wikipedia
Genuine Sony Playstation 3 PS3 authentic OEM Dualshock 3 Sixaxis controller | eBay
Sony PlayStation 3 PS3 Console 80GB Complete w Original DualShock Controller Fat | eBay
Spotting a Fake PS3 Dualshock Controller
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: Sony Playstation PS3 Dualshock 3 Controller - Blue (99007) : Video Games
OEM PS3 DUAL SHOCK 3 CONTROLLER METALLIC GOLD RARE ORIGINAL SEALED PLAYSTATION | eBay