The 1940-D, 1936-D and the 1935-D coins, as well as many others in the series, are considerably more valuable than other quarters. This is not due to their mintages, but rather because they are harder to find in high grades (a situation referred to as "condition rarity"). Many of these coins are worth only melt value in low grades. Other coins in the above list are expensive because of their extremely low mintages, such as the 1932 Denver and San Francisco issues. The overstruck mintmark issues are also scarce and expensive, especially in the higher grades; even so they may not have the same popularity as overdates found in pre-Washington quarter series.