These are the most valuable stamps from around the world. Value: $234,000 The British Board of Education didn't usually issue stamps using its popular moniker, and this sample from 1902 is an ...

The "Inverted Jenny," 1918, one of the rarest and most valuable stamps in the world, celebrates the first air mail in the U.S.—by depicting an inadvertently upside-down airplane. Hannah Whitaker ...