Lately the Chinese have stopped allowing the shipment of Lithuim-ion batteries via air mail over cited safety concerns. This means the price of Lithuim-ion batteries has already gone up across the board. It was a nice ride while it lasted though, with genuine Panasonic 18650 batteries going for as little as 5 bucks a piece new. But I believe that some Chinese sellers like Fasttech and Wallbuys are continuing to ship them and let people take their chances. Other than that, your best bet will be with an e-bay seller who ships locally, and of course there are reputable U.S. sellers who still sell them at the normal markup. But the days of dirt cheap Panasonic and Sanyo batteries might be over. Oh well, at least we stocked up a bit.