The unit appears to be working fine, I noticed the Manual button on the Variation section appears to be not responding somehow, but otherwise all other buttons and knobs and switches worked fine as being tested. The speaker sounds fine too. I also noticed the FILL IN knob seems to be not in correct position which could also with some adjustment/servicing.
Cosmetically the unit is in nice condition as you can see. There are some wear and marks here and there with one of the slider head appears missing and minor crack on a few as pictured, but nothing too major. I’m including plenty of pictures so you can see exactly how it looks.” Link