A first-class U.S. postage stamp will set you back 66 cents these days, which, you know, might seem expensive to anyone who remembers cheaper postage. AILSA CHANG, HOST: But a stamp that's more than a ...

Here’s something for serious stamp collectors only. This summer, philatelists will have a chance to snag the rarest US stamp ever: the 1868 one-cent “Z-grill.” Interested? It’ll cost you (more than) a ...

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 ...

UNDATED (CNN Newsource/WKRC) - The rarest stamp known to still exist in the United States is set to go to auction and is currently expected to sell for millions of dollars. It's the 1868 One-Cent ...

The 1868 One-cent Z Grill stamp is one of only two known surviving copies, and the only available to collectors. (Robert A. Siegel Auction Galleries) Famed bond manager Bill Gross is selling out of a ...

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 ...