Stamp Superstars: Some of the Rarest and Most Costly Stamps in the World

Like professional athletes or movie stars, the stamp world has several superstars: the most famous of the famous classic stamps. Except for the Penny Black these stamps are super rare and except for it you're not likely to ever see any of them, but they're all interesting to read about. Some have interesting stories behind them, and many of these classic stamps are likely to fetch extremely high prices when they go up for sale - if they ever do.

Great Britain's 1840 One Penny Black, the first adhesive stamp ever issued. Although they're not considered rare, they're not a dime a dozen either, and they hold an important place in philatelic history. Used examples usually command prices in the hundred-dollar range, while fifteen years ago an unused example sold for $2.4 million dollars.

The 1847 Mauritius Post Office stamp, the legendary rare stamp (only a few hundred were printed and far fewer still exist) from the British Colony of Mauritius. In addition to being very old, it is actually a stamp with a printing error: instead of being imprinted with the words "post paid," the words "post office" are incorrectly on the stamp. A cover mailed with two of the stamps on it sold for about $4 million around 15 years ago.

The 1851 Hawaiian Missionaries stamps, used by missionaries on Hawaii to send their mail. The two cent stamps (only 16 known to exist) are the most valuable, ranging in cost from around $200,000 to $800,000. The five cent and 13 cent stamps are also quite pricey.

The Swedish 1855 Treskilling Banco Yellow stamp is perhaps the most famous of all stamps. It's an error of color that was supposed to be printed in blue-green, but somehow ended up being yellow. Only one is known to exist, and it's the rarest stamp in the world. It has fetched world-record prices whenever it has been sold, and without doubt it will continue to do so.

The 1856 British Guiana One Cent Black on Magenta stamp, also extremely rare. It's a rectangular stamp with black ink printed on magenta paper, but the corners are snipped off, making it an octagonal shape. Originally discovered by a young boy, it sold for almost $1 million about 30 years ago.

The 1868 US 1 cent Z Grill, the rarest and most valuable United States stamp. The front features a portrait of Benjamin Franklin and the back has a Z variety grill, intended to stop people from re-using the stamps by causing the postmark ink to settle more deeply into the stamp. Only two of these stamps are known; one is owned by the New York Public Library while the other is in a private collection. That stamp was "sold" a few years ago in exchange for a block of four Inverted Jenny stamps (themselves worthy of stamp superstar status) worth almost $3 million.