Cushman 3 wheeled Truckster

[amigauser]

I am going to be looking at an older used 80's?? Cushman Truckster 3 wheeled utility vehicle with a hydraulic dump. I believe it uses a 20 or 22 HP Onan gas engine. Does anyone have an idea what one would be worth? They appear to be very heavy duty, at least from what I have read on the net.

Thanks.