via this auctionPics of the inside below.
"For repair is a ARP Pro Soloist in good cosmetic condition with only very minor oxidation in some places (as seen in pictures). The ARP powers on and makes noise, and all of the "voices" seem to work as well as the octave transpose. However, the problem is that all keys produce the same pitch without variance for each voice. Imagine a guitar fitted with six identical strings, that's sort of what it's like.
This unit was purchased at auction in a rotted out anvil case. The dried out foam substance from the case was stuck to the synthesizer inside and out. The outside has been almost completely cleaned off (you can still see some blue residue in some of the pictures which should come off with further cleaning). Unfortunately, one of the side panels is broken so the stuff got onto the boards inside. I cleaned off what I could get to without removing anything, and as you can see in the pictures, the boards look fine after a simple dusting with a DRY rag.
Cosmetically, the unit is very good. The keys are very clean with virtually no scratches and no sticky keys like those found on almost every synthesizer produced in the 70's. Only one slider cap out of four is left but it is chipped so it's not of much use. I also have the screws for the broken side panel. They appear to just need to be glued in place so that should be an easy fix. The (original?, not sure) music stand is also included. It has to be screwed in place if you ever need to use it."
