You've probably seen many designer handbags for much cheaper than the usual retail price, whether on Ebay or through a private seller. While the low prices are extremely appealing, how will you know if the handbag is authentic or not? There are many things you can look at to determine that the handbag is authentic depending on the bag, but the only way to be 100% sure your bag is real is to buy the handbag from the source. If you're really dying for the latest Gucci purse, go to a Gucci store or by the bag from Gucci's website. You may have to spend a bit more, but at least you'll know your handbag is the real deal.