Finding urban art for sale online takes about four seconds. Actually pressing buy is another matter. Your card's in your hand, there's a photo on the screen, and a little voice is asking whether it's genuine, whether it'll survive the post, and whether you're about to overpay someone you've never met. We know that feeling well. We've been answering those exact questions for collectors since 2015. BSMT is an independent gallery on Kingsland Road in Dalston, East London. Over m