Is this a deluxe upright, with the big plastic bezel, and the artwork on the side that has the couple in the car, or the black and red upright?? If it is not working it should be less than $100 US, the boards alone on these things can be $150 or more, so there are many non-working ones out there. One of the members was trying to give one away recently, and did not have any luck.
So, IF it is working, I would say somewhere in the $250- $300 range would not be too bad, not working the price should come way down, because these things are expensive to fix.
Patrick