Thanks to everyone who replied to this thread. I did not get it the bag in the end. When I was talking to the private seller, I felt like she was always pressuring me to get the bag, by saying that she has 3 other girls who want to buy it and are ready to pay for it and that lots of people were emailing her about the bag. Her explanation for the lack of serial number sticker, authenticity card, dustbag, receipt, and box was that she trusts her brother 100% and they would always buy bags for her from the boutiques...a very GOOD reason. When I asked her for more pictures, they were very unclear, as if she took the pictures with a very shaky hand. She was definitely a liar. I decided to put my name down on a waiting list for the flap bag.