**If you see this post, the item is still available.**
Selling a working CMU-800R with Apple II to MIDI adapter. Think of this thing as a Roland CV/gate sequencer with a built in TR-606 style drum machine and simple mono and poly synth voices. I purchased this as a sealed item online a few years ago, and have connected it to Ableton and confirm it works. No scratchy pots or anything, it's as nice as your going to find for a unit so old and rare.
More info on the MIDI adapter can be found here: https://beatnic.jp/products/cmu-800-midi-interface/
$400 cash firm, no trades, pick up in West Seattle.