I feel this is a bit contradictory because it's the collecting board, but I couldn't think of an active topic like this.
I'm currently at Anime Expo, and saw the Eni puzzle booth. They had this on display.
0704141104.jpg [ 1.07 MiB | Viewed 297 times ]
The brail puzzle signed by Sylvester Stallone. Not for sale, but wow it was cool to see.