The Trendy Locker are having a big pop-up sale this month, with up to 90% off retail prices on preloved and new designer pieces from brands like Celine, Balenciaga, Chanel, Stella McCartney, Gucci, Sophia Webster, Bottega Veneta, Carven, Balmain, Valentino, Saint Laurent, Isabel Marant, Miu Miu, Fendi, Dior, Tom Ford and Prada