David Gonzalez bought a house for $10k in order to flip it and resell it, but as he was tearing down the walls, he discovered the most valuable comic in the world, the 1938 Action Comic #1 (worth more than $2 million in mint condition) introducing none other than the Man of Steel himself, Superman! This copy is in poor condition but David has put it up for auction and it's already up to $113k. That's over 1000% profit over what he initially paid for the house!! Check out his Comicconnect.com auction (and bid if you've got extra multiple grand hanging around!)