Every brand has its starting point, right? For Lego, it started with a set of self-binding bricks. They were invented in 1949 and sold only in Denmark, where Lego originated.

The item's high price is not because of its quantity or the fan base associated with it, but because it's so old.

This set is such an important part of Lego's history that it's not easy to find an original Lego set to sell, but once found, they can cost up to $3,000.