I bought from the same company (although a different eBay id, but they seem to have several), ordered three, £16.50 each at the time. They arrived from China in a week and a half, with no customs charges. Came with two pin chargers, but with UK adapters.
They work fine, very bright, but a bit spotty, so I ordered 3 of the ‘orange peel’ reflectors and one wide angle lens from Action LED in the US. The reflectors make the light pattern a lot more usable, and the wide angle lens gives a good flood for the bars. I use two bar mounted, one flood and one spot, and one spot on the helmet. One on the helmet would probably be ok most of the time, but having two lights, one on the helmet and one on the bars does help with depth perception.