I currently work at a David's Bridal and I would like to say that I recently did a search to see what was out there...MANY of the listings (especially the buy-it-nows) were not authentic David's Bridal.  I would caution any bride-to-be about ordering something that claims to be David's Bridal but will not give a serial number.  You should be able to find it on the davidsbridal.com website, and if that doesn't work feel free to call your local store to see if it is an item that has been discontinued.  There are genuine "gently used" items, but I would question anything that is "new".  I have seen first hand the frustration from my customers that order things online and are more than disappointed by the quality!