I suspect that my days of buying things for cheap from people who don’t know what they have are over, because I’ve already had more than one lifetime worth of luck. I was working at a piano and organ store that had this unit collecting dust on a shelf. No one but me knew what it was. They sold it to me for $150. I think it was listed for about $800 at the time.
I used to run a live show off this thing, and I also did a few solo gigs with it. It’s obtuse, but it’s a rock.
And kind of cute, too. Like a musical adding machine.