You know that dusty old box of comics you have in your attic? You might want to check what’s in there because one of those issues might set you up for retirement. According to Bleeding Cool, a copy of The Incredible Hulk #1 from 1962 just sold at Comic Connect for a record-breaking $320,000.

That’s the most ever paid for this issue, which was graded as a 9.2 out of 10. That means it’s nearly pristine for an issue this old. There are only three other copies in existence with such a grade, plus one that was actually graded a 9.4.

Written by Stan Lee and illustrated by Jack Kirby, Incredible Hulk #1 is iconic because it’s the first appearance of the Hulk himself, who was actually portrayed as grey in the issue. He was later changed to green because the printing techniques at the time couldn’t pump out a consistent tone of grey. Remember kids, never throw out your old comics. 

[Comic Connect via Bleeding Cool]