Chanel sunglasses are hard to come by. since everything on ebay sells for 20-30% less then retail , you have to be able to tell what's real and what's NOT. All chanel sunglasses have 4 digit model numbers and usually 6 digit color numbers the first 3 are the frame color and the last 3 are the lens color. Also all chanel sunglasses come with a serial number either on the lens or the frame.