On 14 January, its first day of trading, Poshmark popped. The peer-to-peer marketplace closed more than 140 per cent above listing price, valuing the company at $7.5 billion. It’s not the only one. Competition in the resale and aftermarket categories has led to a rush of public filings and rumoured IPOs. The RealReal, luxury’s high-profile marketplace, was first, listing in 2019, although it is yet to report a profit despite collaborations with players such as Gucci and Burbe