I don’t think I’ll ever forget the road that led to my very first designer handbag purchase. It was five years ago now, and I’d spent two years utterly and completely obsessed with Proenza Schouler’s PS11 satchel, which at the time, sold out almost as quickly as it landed on the shelves. I’ve told this story a few times now, but I dragged my bestie to about 11 department stores across the US in search of this bag, only to fall short each and every time. In the end, I bought it from the only place I could find it;…