What's in the attic?

A high-grade copy of Superman No. 1 from 1939 was sold at auction for over $9 million, setting a new record for the most expensive comic book ever sold. The specific sale price was reported as approximately $9.12 million. 

The comic was recently discovered by three brothers in their late mother's California attic, protected only by a stack of old newspapers. Despite its modest storage, the comic was in remarkable condition and received a grade of 9.0 on a 10-point scale from the Certified Guaranty Company (CGC), an independent authority that grades collectibles for auction.