I got mine through the auction and wasn't terribly unhappy with my purchase. The cheap price I paid
was satisfying to me. The prop isn't extremely impressive. Balsa wood and a small plastic window.
Very small in size too. The die is smaller than the standard die, and the box is only a little
bigger. Its definitely a fun puzzle and nobody can figure it out without the secret. I didn't think
mine worked for the first few days but I eventually figured out the proper technique and I can do it
almost every time now (Doesn't mean I will). It will get scratched a bit probably but that's okay.
It just looks old. I don't really recommend it.