An old British stamp from the island of Mauritius is worth millions now -- due to both its royalty and use in a high-class ...

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 ...

Stamps feel almost novel today, but they aren't that old of an invention. The first American stamps weren't issued until 1847, but it wasn't long before people grew fascinated by the different colors ...

A Christmas stamp over 50 years old could be sold for over £500 thanks to an unusual printing mishap. The three pence stamp depicting an angel from Heaven – one of just 24 unused examples in existence ...