I'm 21 and make up to $280,000 a month reselling sneakers. I don't see my friends much and still live at home.

Robbie Cartwright resells sneakers online. Courtesy of Robbie Cartwright Robbie Cartwright started selling items when he was about 11. He now makes hundreds of thousands reselling sneakers online. He was late for his own 21st birthday because he was working, and he rarely sees friends. This as-told-to essay is based on a conversation with Robbie Cartwright, founder of Yorkshire Trainers . It has been edited for length and clarity . I've been selling things since I was a child: candy bars, fidget spinners — you name it. My middle school had a challenge to see which student could take a small investment of about $10 and make the most profit. I won, selling hooks to hang handbags on. I profited more than $1,000 over the six weeks of the challenge, although it was all for charity. By the time I was about 14, I was reselling sneakers .