Do you mean official Sega stuff? If that's the case, then this is what I have.
a steering wheel, a flight stick, 2 arcade sticks, a 6-player adapter, a twin stick, a mouse, a backup ram cart, a stunner gun, a box full of varies gamepads, 2 s-video cables, 1 model 1 unit, 2 model 2 units (both...