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

Undoubtedly, the rarest and most expensive German stamp ever sold at auction is the Baden 9 Kreuzer error stamp. The nitty-gritty of stamp collecting can be as ...

Get your stamp book ready for the ultimate addition. This summer, Robert A. Siegel Auction Galleries is offering the William H. Gross Collection of United States Stamps. The organization is ...

A one-cent postage stamp from 1868 is expected to become the most expensive U.S. stamp ever sold when it heads to auction in June. Known as the “Z-grill,” the stamp is the most-valued piece of what ...

In June, New York’s Robert A. Siegel Auction Galleries will offer what it is billing as the most valuable U.S. postage stamp, an extraordinarily rare 1868 one-cent “Z-grill” stamp featuring Benjamin ...

Known as the world’s most valuable and rare stamp, this unique piece was produced during a stamp shortage in British Guiana. Only one copy is known to exist, discovered by a 12-year-old Scottish boy ...