I've bought from eBay a few times, with good results. In all cases, they were LE or discontinued bags that I'd missed out on when they were released. I tend to only buy on eBay if the bag is in new, unused condition. And of course I thoroughly authenticate any bag I'm considering. Cost is also a big factor, with all the recent price increases. Ebay definitely has some deals, but you have to be a cautious buyer.