I am still considering arcade parts as trade toward my service's if anyone would like to go that route.
I would consider:
spinners
buttons
joysticks
ultimarc boards like j-pac, i-pac, opti-pac etc.
groovy game gear boards like keywiz, optiwiz etc.
black gmaecube lcd screen intec or interact brand
full jamma harness with kick harness
may consider other stuff too just make an offer.