Detective Comics #42 value

Detective Comics #42 (1940) is a highly valuable comic book, with sold comps showing a used price of $666 [1]. This issue is notable because it features the first appearance of Batman's sidekick, Robin. The value is driven by its historical significance and condition. If you're considering selling or buying, the current eBay asking prices for this issue are significantly higher, with a median of $1,879.99 [1]. Always ensure the issue and year match exactly, as newer editions like the 2015 version are worth far less [2].