The comic - a rare Action Comics No. 1 which features the first appearance of Superman - was only uncovered as they were packing up their home.
The unnamed family were facing foreclosure on their home and unable to come up with the cash to save it, were looking in their basement for boxes.
Realising it could be worth something the contacted comic book auction experts who said the comic could sell for $250,000.
The bank have agreed to wait until the sale on August 27… to see if Superman really can fly in and save the day at the last moment.