@bitpunk.fm That's an idea. I would actually like to get the decks playing again on principle. The two Sonys are worth fixing but probably hideously complex. The Commodore C2N is probably easiest to fix being mechanically the most simple....
I've seen some belt kits on ebay and the like. Good luck with it, I'd be curious to hear how it goes. From what I've seen as long as the belts haven't melted, it could be OK. Otherwise you gotta get in there and clean a bunch of nasty goo.