After recently modding a new arcade stick I have 16 left over buttons that are brand new. These are the Qanba KS-30 silent buttons. Less click, but feels like a sanwa button.

This auction includes;
Buttons:
8 30mm orange/metallic pink buttons brand new
4 30mm metallic silver buttons brand new
4 30mm dark purple buttons brand new
4 24mm metallic pink buttons brand new

Other Parts:
4 joystick dustwashers (black)
2 balltops (mirror, black)
1 battop (black)
2 joystick shaft covers (black)

If you use buy it now I refund your shipping so it's free.