I looked into it a little. I don't think Amazon is where I would go to get tools or supplies. It's a bit of an art/touch. The better equipped, the better the chance for decent results.
My take from the time i put into researching it was it has potential for side work on low difficulty parking lot dings. But the right equipment would cost a few hundred bucks and you would have to devote some time to practice.
So, for ones personal dents: no; as a sideline: maybe.