I don't really understand this. I originally bought 1 pair of these sunglasses on ebay for about £9 to replace a pair I had lost. I then saw an offer from Eyekeeper of 3 pairs (same design - slightly different shape) for about £20, which I bought. I then saw an offer from Eyekeeper for 3 pairs for about £10, so I bought them too. So I now have 7 pairs, but I !ike the design and the polarisation, so why not? But how can they sell them so cheaply?