StockX sees soaring sneaker sales

Aaron Fields, senior authenticator for StockX, inspects a pair of Nike Mars Yard sneakers.

Aaron Fields, senior authenticator at StockX, inspects a pair of Nike Air Formposite One shoes.

StockX CEO and co-founder Josh Luber talks to an auditorium full of sneaker fans during the StockX Day2 event in the Madison building in Detroit. StockX is a secondary market for the resale of sneakers, street wear, hand bags and watches.

Kayce Kirihara, 29, of Seattle, Washington, listens to StockX CEO Josh Luber.

StockX CEO and co-founder Josh Luber talks to buyers, sellers and sneaker fans during a recent StockX Day2 event in Detroit.

StockX CEO and co-founder Josh Luber wears custom Air Jordan sneakers made from Chicago Bulls jerseys and basketballs during the StockX Day2 event recently in Detroit.

Buyers, sellers and sneake fashion fans listen to StockX CEO and co-founder Josh Luber during the StockX Day2 event in Detroit recently.

Ohmare Washington, right, 37, of Houston, records the Stock X event in Detroit. XXXXBuyers, sellers and fans of StockX listen to company CEO and co-founder Josh Luber during the StockX Day2 event in the Madison building, Friday afternoon, April 20, 2018. StockX is a secondary market for the resale of sneakers, street wear, hand bags and watches. (Todd McInturf, The Detroit News)2018.

Workers continue the process of authenticating, quality control, and shipping for the sneaker porting of StockX inside the One Campus Martius Building in downtown Detroit.

Workers continue the process of authenticating, quality control, and shipping for StockX inside the One Campus Martius building in downtown Detroit.

Sneakers on display at StockX in Detroit.

A replica of the Cleveland Cavaliers Championship ring made of durilium metal and cubic zircon gemstones which is part of the limited edition Lebron 14s at Stock X headquarters inside the Compuware Building in downtown Detroit.