A rare Benjamin Franklin Z-grill stamp from 1868 could fetch as much as $5 million once it hits auction in New York. There are only two known stamps in existence.

A stamp catalogue is essentially a book to map the origin, price list and current market value of stamps issued by every ...

A famous invert error stamp has sold for well over its estimate at a New York sale. Discover the upside-down 1c Pan-American ...

A thematic stamp collection highlighting the “postal history” of Hartford in the 18th and 19th centuries is heading to auction in March after winning several major awards. A result of years of ...

Collectors and investors who acquire these valuable items may still see solid returns, as demonstrated by record auction ...