Arguably the most famous and valuable stamp in the world, the British Guiana 1-Cent Magenta has achieved near-mythic status. Issued in 1856 in what is now Guyana, this small, faded red stamp was ...

A 1-cent postage stamp from a 19th century British colony in South America has become the world's most valuable stamp - again. Sotheby's says the 1856 British Guiana One-Cent Magenta sold Tuesday at ...

An inside look at the obsessive, secretive, and often bizarre world of high-profile stamp collecting, told through the journey of the world's most sought-after stamp. When it was issued in 1856, it ...

While commonly worth just one cent, certain U.S. pennies with rare minting errors, historic firsts, or extremely low mintage have sold for astronomical prices—sometimes millions. Here are ten of the ...