Anyone who’s seen the dreaded words “sold out” while navigating the endless scroll of online shopping – or worse, heard those very same words after hours spent queuing outside a store – should have Gab Waller on speed dial. Where some may see those words for what they are, Waller sees an invitation to dig even deeper to find the coveted item you want, whether it’s the hottest accessory this season – she recently cited Alaïa’s Le Teckel suede clutch and Dior’s Médaillon belt as new must-haves –...