Rarest items in the world

Post more stuff like this! It's cool!

All I could think of when I saw the Gutenberg Bible was how in The Day After Tomorrow they saved one and didn't burn it.

Bran Castle is a museum. I doubt it's for sale.

actually the rarest thing on earth is anti-matter we barely have 1 billionth of a gram and it would still sell for about over 21 billion dollars