There's a new mechanical puzzle on the market called The Venn Puzzle.
It's a 3 piece coordinate motion puzzle. The object: put the 3 pieces together. $75
From what I've seen on the Kickstarter webpage, it looks a lot like Kuku,which has been out for at least 7 years. Sonic Games: http://www.sonicgames-uk.com/isis-adventure/products/kuku-puzzle/58
is the producer of Kuku. Kuku is going back on the market very soon and you can buy one for 150 pounds. (At the last International Puzzle Party, I sold my copy for $75 to an old friend. I told him it was a good deal!)
As coordinate motion puzzles go, The Venn Puzzle looks pretty easy. Line up the pieces carefully. Your dexterity is important! And voila.
Kuku is much better because it has 3 internal pins. You can solve it with 0, 1, 2 or 3 pins.