I would say they are super rare to find in that condition. Out of the few I have seen, all were in really bad shape.
Good salesmanship helps, I was getting ready to bid. Actually, there was one in mint condition on GB a couple years ago. It turned out it was for sale about 20 miles from me. I goofed around until it sold and then posted my questions here. I'm not going to tell you the names people called me for letting it get away for $750, Joe.
I wouldn't call them "super rare", but I've only seen one in person, and it resides in my gun safe.