Alright, I found some stuff to sell.
1x Player 3 Start Button
1x Player 4 Start Button
7x Blue Happ Pushbuttons
7x Red Happ Pushbuttons
All the pushbuttons are new and come with cherry switches and nuts. Asking $18 shipped for the lot of the pushbuttons, or $15 shipped without the start buttons. Start buttons are $3 shipped (each, both for $5 shipped) -
2x Happ Perfect 360 Joystick - $38 shipped for one or $55 shipped for both.
2x 802.11g Airlink+ Wireless Routers - $10 shipped for either (both new, one still in wrapping)
1x Metal Slug MVS mini marquee - $5 shipped