Bally Spectrum is most definately rare... low production and most sent to the tip... reason? Its a huge lemon! No pop bumpers and awkward to play.
there are 5 balls in play at all times... should the game turn off and one of these balls isnt in its correct position then the game logic gets thrown out and the machine fails to send a ball down to the flippers for play. Bet my arse this is why it failed onsite so badly... funny thing is... the manual doesnt cover this, i had to work it out in order to get the game going... SPECTRUM... stear clear!