*hi. i very recently purchased a kooba white sienna handbag from eBay. it looked authentic and i checked on all the little details....yet i still have a little bit of skepticism because the seller has already had 2 or 3 marc jacobs ivory stam bags up for auction....this definately scares me a little. i was wondering if anyone could give me their opinion on whether or not the kooba is authentic? thank you!* the link for the auction is http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=103000855350&rd=1&sspagename=STRK%3AMEWN%3AIT&rd=1 if the link doesnt work the item number is 103000855350 thanks again!