I saw one at the Allentown show in the fleamarket section. It was still folded up, but from what I could see, it had many many plays on it. It had seen better days.
I think he wanted $350 for it.
I would love one of these myself, but I couldn't spend a ton of cash for it and still be able to get one not on its last leg.
They remember playing them at Canobie Lake Park when I was a kid.