There's a load of scammers out there at the moment and they seem to be targeting photographic equipment at the moment! I'm looking for good reasonably priced Nikon 400mm 2.8 (bit like trying to find rocking horse poo) very rare!!!
I've search most sites but each time a low price as turned out to be a scam (about 6 now) always the same they have moved away to the Shetland islands or somewhere, never answer when you request a serial number for the lens and suggested paying by a fictitious DHL site that guarantees keeping the money until you happy with your purchase. So be careful when seeing a price to good to be true as it usually is.