Bending over trays of jade pendants, gemstone brooches and old watches, Dianne Gupta takes her time as she sifts through a heap of tangled necklaces and rings. “I enjoy the hunt. It’s like finding hidden treasure when I see something I like,” she says, drifting from stall to stall along Apliu Street, well known for second-hand and vintage stalls, in Hong Kong’s Sham Shui Po neighbourhood. Several years ago, Gupta – who has been buying preloved items since she was a child – found a pair of Miu...