Detective Comics #66 (1942) worth

The catalog shows that Detective Comics #66 (1942) has a used value of $900. This is a key Silver Age comic book, and its value is driven by its rarity and historical significance as one of the earliest appearances of key characters. To get a full picture, you can compare this sold value against the current live asking prices shown on the page to see if it's currently priced above or below its established market value.