You don't need to be a coin collector to have piggy banks stashed around your house filled with quarters, dimes, nickels or ...

William H. Gross was a famous stamp collector, and this 2 cents Hawaiian Missionary stamp was the most valuable stamp in his collection. The stamp, dating back to 1851, went for $619,500 at a ...

Known as the world’s most valuable ... “F Grill” stamp for under $150. These stamps, which were the first to be issued in Hawaii, featured denominations of 2, 5, and 13 cents.