What's so special about the New Sea 6500 submarine Lego? Well, in addition to its cool look, it's also the first official Lego idea set ever produced! On top of that, it was only released in Japan, with a very limited production.

It's also based on a real submarine, not a yellow one.

The boxed set is already over $200, so expect the sealed version of mint condition to go down to $1,800! That's the price of owning a historical artifact with only 10,000 copies in the world.