I suffer from the same disorder and am trying to stop. You don't know how many times a day I have to say to myself, 'It's only a handbag..." And while I have had great luck selling all of my mid-range bags on ebay, the Noir Paddy was an absolute *nightmare"! Between the emails from other ebayers insisting it was a replica and the fakers overseas trying to get me to visit their websites (lost count of the number it was SO bad), I vowed never again to take such expensive purchases to ebay! If one is mentally prepared (and financially able) to lose a lot of money on their high-end bags, ebay can be a godsend, but for me, it was a huge, huge headache.
The experience has taught me to give more thought to my purchases, to stop buying on impulse, and be thankful for the beautiful collection I currently own.