I used to work at Hermès. I saw customers make the same 5 mistakes — especially when trying to get a coveted Birkin.

I used to work at Hermès and saw customers make the same mistakes over and over again. Cristina Arias/Getty Images As a former Hermès employee, I saw customers make some common mistakes when shopping in-store. It's important to understand that most shoppers can't just walk in and buy a Birkin bag. Customers should have a good relationship with their sales associate, but they shouldn't bug them. I spent two years working in retail marketing and visual merchandising at Hermés. The French fash...