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The platform, eBay and others have now launched authentication services for high end and expensive goods.

An eBay boss told the BBC they have authenticated 10 million luxury items so buyers can "be confident" they're not getting a fake.

Kirsty Keoghan, eBay's global general manager of fashion, said the market for designer second-hand fashion from brands such as Nike Air Jordan trainers, Rolex watches and Hermes Kelly handbags is "growing exponentially".

"We do a lot in the background to make sure those listings don't end up on eBay."

Vinted, Depop and eBay have said they would suspend or ban users if they're caught selling counterfeit goods.