When I was in college, I heard the story of Siguard Rascher having a keyless saxophone. Basically, a conical tube in the shape of a sax. Mr. Rascher was reported to be able to play anything on it.
Well, looks like you can actually get one and try to be a virtuoso like Siguard Rascher. Hollywood Winds sells an alto and a tenor version for $495 and $695 respectively.
I wonder if it would be cheaper to get an old C-Melody off of Ebay and just plug the holes….