Superman's debut comic book sold for just 10 cents in 1938. But today, a rare original is worth many times more.
A "pristine" copy of Action Comics #1 will go on auction in August, eBay announced Tuesday.
Collectors know of about 50 remaining copies of the book, and consider this copy to be in the best condition of them all. It earned a 9.0 grade -- "very fine" -- from the Certified Guaranty Company, which rates comic books.
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