A block of the world's second official postage stamp is going up for auction in May, and is expected to fetch millions of ...

(CNN) – A block of the world’s second official postage stamp is going up for auction in May. It is expected to fetch millions ...

The Penny Black, which introduced a flat rate, was used starting May 6, 1840. Before that, the recipient paid the postage cost. The world's first postage stamp, the Penny Black, is going up for ...

An ultra-rare U.S. postage stamp is going under the hammer this summer — and it may fetch as much as $5 million. Robert A. Siegel Auction Galleries in New York recently announced that it will be ...

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 rare, 12-cent U.S. postage stamp showing an image of our nation’s first president sold for tens of thousands of dollars at auction last month. The stamp, which includes a portrait bust of George ...

An example of the world's first postage stamp, the Penny Black, is being offered at a Sotheby’s auction in December. Dating from 1840, the item is "the earliest securely dated example of the first ...

Many collectors today wonder if postage stamps are good investments. While some rare and historical stamps have increased in value over the years, the market can be very unpredictable. Factors like ...

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 ...

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 ...