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 ...