Plus: There are no working units for sale. If there's an Emulator for sale, you can bet it's not working.
I must have been lucky. Mine almost worked for 100pct when I bought it a month ago. It had some tuning stability problems (keyboard cv-like), one voice sometimes worked, sometimes not, and the brightness of each channel was different. And it needed quite a lot of cleaning (contacts, keys, boards, ...).
I gave it a thorough service myself, but no real repairs were required to bring it in 100 pct shape again.
The price I paid was indeed in the 800-1000 USD range, but the package included also disks and other stuff.