Here’s a look at some of the 12 most valuable American stamps that are still out there, waiting to be discovered by lucky ...

The stamp, seen here with Siegel Auctions President Scott Trepel, once famously featured in an episode of the Simpsons A rare US postage stamp has sold for $2m (£1.63m) in a New York auction ...

The first stamp was created in Great Britain on May 1, 1840. It wouldn't take long for people to start collecting them. Just one year later, a woman placed an ad in the London Times seeking ...