Last year, almost one billion passengers flew within the U.S.

That works out to 27 million flying every day.

And while the airlines boast that more than 99% of all checked bags are ultimately reunited with their owners, that remaining 1% represents a lot of permanently lost bags — and those end up at the Unclaimed Baggage Center in Alabama, where the contents are put on sale.

And the top finds last year of stuff inside those bags?

Everything from a fully assembled robot, a meteorite, a gold bar from Australia, samurai swords, gold-plated golf clubs, and white diamond earrings, which sold for more than $21,000.