My buddy Jason Kozlowski had two in his auction two years back and that's after he sold one to Steve Guider along with a Snowco trailer. The one you saw on e-Bay did not sell the first time out and I don't know if he re-listed it or not. My site partner Jack has one done in Colt colors that he's going to restore.
They are a well-made unit and should be considered a collector item now. But few collectors will pay large coin for them because they are a bit of pain to haul to shows. They're sort of a novelty item like the later cart with the Conestoga kit on them.