Why The 1847 Mauritius Post Office Stamps Are So Valuable The 1847 Mauritius Post Office Stamp is believed to be one of the most valuable collectibles in existence, with only 500 produced.

7 Rare German Stamps That Prove Snail Mail Pays Big . There's a lot of German history we'd like to say auf wiedersehen to, ...

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 ...

A ultra-rare stamp that has been described as “the holy grail of postage”, the ‘Inverted Jenny’ has is an auction-house ...

"It's led to a lot more value in all kinds of gold and silver, including old coins." John Feigenbaum, publisher of the rare coin guide "Greysheet," told USA TODAY that rare coins are hard to come by.