51,000 were printed, and fewer than 150 are still around. The stamp is worth an estimated $547,464 adjusted for inflation since its $425,000 sale in 2011. Like baseball cards, you often need a ...

An unspoiled copy of one of the rarest American stamps changed hands for a record $2 million on Wednesday, the New York auction house that sold the 1918 "Inverted Jenny" stamp said. The same stamp had ...