What is the value of a 20-cent stamp of Harry S. Truman?

According to Mystic Stamp Company, the 1984 Harry S. Truman 20-cent stamp has a used value of $0.15, with mint copies worth up $0.90. While popular among collectors, the stamp showing the 33rd president is readily available and not considered a rare find.

The black-on-white stamp was issued on January 26, 1984, and more than 350,000,000 were produced by Washington D.C's Bureau of Engraving and Printing. It is one of 64 stamps in the well-received Great Americans Series, released to honor important individuals who were leaders in the fields of art, civil and human rights, education, literature and the military.