From Retrousb.com i bought 2 Nes Controller modded, 2 Snes Controller Modded , 1 Sega Genesis Modded.
Furthermore from Ebay i bought one adapter USB for Sega/Amiga/Atari controllers. And a couple of old joysticks i was used to play with Amiga games.
A lot of money, but every euro has been worth to be spent.
We have too many things for free, emulator games support and so on.
Sometimes we have to pay money to come back children