The global resale market is growing three times faster than primary retail, with secondhand clothing sales forecast to hit $289 billion as AI helps shoppers find deals faster. It is not replacing the primary market, but sitting alongside it, shaping what people decide is worth buying. Brands that ignore it will find their pricing and relevance decided for them, because novelty isn’t the primary reason for something to be desirable anymore.

Here are five key learnings from the booming resale economy:

1. Resale is boosting the primary market, not taking away from it. One does not exclude the other: the person who buys a 1998 Ralph Lauren rugby shirt on Vinted will likely buy this season’s new Ralph Lauren too. BCG’s research on secondhand luxury confirms it — pre-owned shoppers also buy new, often from the same brand. Resale works as an intro to a label.

2. Cultural fluency is beating newness. Status now comes from cultural fluency rather than being first on a trend — recognising Issey Miyake’s items in a charity shop and knowing they aren’t “just nice pleated trousers”. That’s the same cultural capital — the status of knowing things — as recognising Satie’s Gymnopédies from its opening notes.Trending nostalgia helps resale grow too. Gen Z are the key drivers of the secondhand market, reflecting a broader “make-it-happen” mentality: faced with stagnant wages and inaccessible housing, they treat resale as an additional source of income. They dust off dad’s football shirts from the attic, list their 8th-grade Twilight t-shirt the moment Zendaya wears one to a press screening, and even buy new pieces specifically for resale, recognising what will only grow in value.

3. Private, curator-led channels are the new distribution. But what about those who don’t know these codes, or don’t have time to hunt? You hire someone who does. WhatsApp drops, paywalled Substacks, invitation-only Instagram feeds — personal shoppers are the new channels. Take @shit.u.should.buy, which curates high-end designer deals from eBay and The RealReal; paying subscribers get first access to “private closet sales” that sell out in minutes. Trust has shifted from institutions to peers and curators.

4. Resale tracks cultural moments in real time. When culture moves, the primary market tries to catch up by producing new versions — but that isn’t always possible. After Giorgio Armani’s death last year, shoppers flooded resale platforms hunting for vintage Armani. That’s why brands are now buying back their own pieces: Alexander McQueen’s “Brand Approved” programme, run with Vestiaire Collective, lets the brand capture the resale margin, authenticate the archive, and keep customers inside its own universe.

5. Secondhand is not automatically more sustainable. The “green” argument for buying secondhand is shakier than it seems. A Yale study from late 2025 found that frequent secondhand shoppers also buy more new clothes, driven by the rebound effect and moral licensing: because secondhand feels cheaper and more sustainable, people consume more overall (rebound effect), and they justify extra purchases by seeing their thrift shopping as a “good” choice (moral licensing). In reality, “thrift haul” culture is just overconsumption dressed differently.