An ultra-rare U.S. postage stamp is going under the hammer ... the most significant and most valuable collection of United States stamps formed this past half century." READ ON THE FOX BUSINESS ...

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 ...

For over 180 years, we’ve been collecting stamps, and philatelists have put a high price on the rarest of the rare ... (it’s said to have been used as postage for a love letter between two ...

"The May 2, 1840, cover connects us to the very beginnings of philately and the modern postal ... it as a "rare philatelic gem." Philately is the study and collection of stamps.