When brothers Donald and Tim Karter opened their comic book store in Las Vegas 22 years ago, neither had any experience running a business.
Donald had lost his job at a casino and Tim worked at a video rental store, and they needed help paying the rent.
But tucked away in storage was an opportunity: Since childhood, Tim Karter had collected comic books and stored some 4,500 of them into 15 boxes.
"I never wanted to throw them out," said Tim, 54.
The brothers figured they might as well try to sell them. They created Dreamwell Comics, which ultimately became …