Etsy’s acquisition of Depop shows that shoppers, led by an eco-conscious Generation Z, are taking things into their own hands, and it has commercial appeal. Fashion for an eco-conscious cohort The ...

This as-told-to essay is based on a transcribed conversation with Danielle Mass, a 25-year-old founder from London, about starting a Depop shop. It has been edited for length and clarity.

Secondhand fashion has become one of the best ways to make a quick buck. Apps like Depop and Vinted provide a platform for side hustles and wardrobe spring cleans alike. Where consumer demand ...