Here’s a look at some of the 12 most valuable American stamps that are still out there, waiting to be discovered by lucky collectors. Learn: 10 Rare Roosevelt Dimes Worth a Lot of Money Also ...

The American-made stamp, printed by the Continental Banknote ... Gross was a famous stamp collector, and this 2 cents Hawaiian Missionary stamp was the most valuable stamp in his collection. The stamp ...

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 ...

Filled with rarities like the erroneously printed Inverted Jenny and the historic Alexandria postmaster’s provisional, his collection of American ... most valuable collection of United States ...