This reseller's side hustle started as a way to get his family out of debt. Now he's made over $1.4 million on StockX by working around 10 hours a month.

• Ray Cao began reselling sneakers and apparel at 17 to help get his family out of debt.
• Cao mostly now sells on StockX and has eclipsed $1.4 million in sales on the marketplace. 
• He began reselling Yeezys and Supreme products but has shifted to flipping readily available items.

Ray Cao helped get his family out of $200,000 in debt by turning to resale as a teenager. Now, eight years later, his hobby has evolved into a profitable side hustle.

As a teen, Cao's parents racked up gambling debt and invested in penny stocks that backfired, he told Insider.

"What got me into reselling was just being desperate to improve the financial situation for my family," Cao said. "There would be arguments every single day regarding what we can spend money on."