America’s most valuable postage stamp sold for nearly $4.4 million on Friday. The 1868 one-cent "Z" Grill was sold as part of the collection owned by "Bond King" Bill Gross, who co-founded asset ...

In 1995, a 2-cent Blue Hawaiian Missionary stamp sold ... making them exceptionally rare. One of these stamps sold at auction for €1.26 million (about $1.73 million after closing costs).

One sold for £400,000 in 2010 ($535,000 today). William H. Gross was a famous stamp collector, and this 2 cents Hawaiian Missionary stamp was the most valuable stamp in his collection.

Japan Post will issue the first new 1-yen (1 cent) postage stamp in 70 years on April 14, featuring its bear mascot character, Posukuma. The mascot’s name combines the Japanese word “kuma ...