Kerstin and Spencer Block founded the resale chain Buffalo Exchange in 1974. Back then, secondhand clothing carried a stigma as a lower-class necessity, said Kerstin Block, the president and co-owner of Buffalo Exchange. The industry is expected to double in size, reaching $350 billion by 2027, and Buffalo Exchange is at the forefront of resale's emerging appeal. Popularizing the 'buy, sell, trade' modelKerstin (left) and Spencer Block in their first resale store in Tucson, Arizona. "It really is the fun part of the job — being in the store and helping customers," Rebecca said.

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Persons: Kerstin, Spencer Block, Rebecca, —, Kerstin Block, Rebecca Block, Tucson , Arizona . Buffalo Exchange Kerstin, Spencer, Jennifer Le Zotte, Le Zotte, Buffalo Exchange Spencer, Buffalo Exchange's Organizations: Buffalo Exchange, Service, Google, Buffalo, Tucson , Arizona . Buffalo Exchange, University of North, tote, Nike Locations: Buffalo, Tucson , Arizona, University of North Carolina, New York, Buffalo Exchange's Ventura , California