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 :
Sony Playstation DualShock 3 Wireless Controller Price List in Philippines & Specs December, 2022
1 YEAR WARRANTY High Quality PS3 DualShock 3 OEM (Certified Refurbished)READY STOCK | Shopee Thailand
Sony Playstation 3 White Dualshock 3 Controller - Shop Sony Playstation 3 White Dualshock 3 Controller - Shop Sony Playstation 3 White Dualshock 3 Controller - Shop Sony Playstation 3 White Dualshock