I've used a Korg ES-50 between 1989 and 1995 for a number of keyboard pieces in my early days as a songwriter. I bought it along with a beat up Rhodes for $50.
After moving out of my parent's house, I didn't have room to set up the unit, so it went into storage. Now, in 2001, after building a larger project studio, I am looking forward to cracking open the shrink wrap and playing the Korg again.
I'd be interested in hearing from anyone who knows how I could get the ES-50 serviced. It's never been 100% funcitonal, but I'd put some money into it to fix it up.