Ahhh, the analogue bug bites again!
Go to this site and look for the MC202
http://www.vintagesynth.org/
There is a cool little demo of what it sounds like. They say it sounds like a mix of a TB303 and SH101 - I'd agree. I don't own one though and honestly I would only buy one for cheap (because no keyboard).
Also, I'm not sure how you could sync it though. I'm guessing the Bass-station you have would do the trick, but if I were you I'd look into that before hand.
So how much can you get it for?