I don't know how it happened but now I'm addicted to B bags. Being new to this I would like to ask for advice on a few things: 1. What store in Chicago sells the bags? 2. How safe is it to buy a used bag online? What should I ask and look for? 3. Does anyone have pictures showing difference between silver and pewter? I'm interesting in getting a bag in this color scheme. 4. I'm 5'2" - how big a bag could I go without looking silly. 5. Can anyone help authenticate this used bag I found online? I've attached a pic. Thanks for any input!