I have one of these, can't remember the model number off hand, I wanted (needed) an auto deck and someone gave me it cos it didn't work (only had to reconnect the audio cables and fit an earth!) but it can't play 12" singles cos the speed is automaticly selected! (d'oh) and yes getting a new cartridge for it is a whopping £60 and that's when you can find someone who sells them, I gave that idea up and bought a Garrard Zero 100SB instead.
B&O's nice ideas, way ahead of there time, but expensive to maintain.