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When influencer Torbian Dennis bought a £150 pair of trainers on a popular online marketplace, he was told by the seller they were genuine.
But when he got them through the post he wasn't sure and checked them on a specialist app – only to discover they were knock-offs.
The pre-loved clothing market is booming and is expected to be worth almost £300bn by 2029, as people shop sustainably or search for bargains in the Cost of Living crisis.
But bargain-hunters are now being warned that criminals could be profiting by selling fake versions of designer clothes, handbags, shoes and even football shirts for prices that suggest they are real.