I've always had a small lusting for the classic Speedy 30 brown monogram bag. I've heard that it's possible to find one (used or vintage) for okay prices on eBay - but i've also heard that there are (of course) tons of fakes on there too. Can anyone give me advice for how to tell if a speedy 30 is authentic or not? Has anyone on the forum purchased theirs off eBay for a good price? TIA!!!