From NPR.

A rare copy of the very first Superman comic has sold for more than $9 million at a Texas auction — the highest price ever paid for a comic book.

Three brothers found it while cleaning out their late mother’s attic in San Francisco. The issue had been tucked in a cardboard box for decades, along with a few other comic books their mother collected before World War II.

Auctioneers say the book is in remarkably good condition — and now among the most valuable collectibles in the world.