When Angela Hwang, a consultant for private equity companies based in Carmel, California, decided she wanted a Hermès Birkin bag, she watched YouTube videos and read the forums on the handbag website PurseBlog for tips. Hwang, who had previously purchased plates, silverware and scarves from the brand, had her heart set on a Birkin 35 in a neutral hue.
But she couldn’t just walk in and buy it. Hermès is known to offer its Birkin and Kelly…