I have an I-PAC, two joysticks (believe they are Happ) and a Happ roller ball
http://imgur.com/a/bnhk5/all#0The trackball is a 3 inch with USB and PS/2 interface, the ball is blue and it lights up. Comes with a black mounting plate. Very nice, it was mounted in a game for about a year, used maybe 10 times. Very similar to
http://na.suzohapp.com/trackballs/565600xx2.htm -ebay listing -
http://www.ebay.com/itm/110800582878?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649The I-PAC is in good condition works well with two joysticks, one red, and one blue -ebay listing
http://www.ebay.com/itm/110800588144?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649Open for pinball trades (boards, playfields, machines)
In Hillsborough, NJ, prefer pick-up. Shipping is available though. Can provide more pictures if needed.
Thanks
Mark