GOTEK is likely the original manufacturer of this device, but since they are just an OEM supplier, they don't have a webshop or sell directly to consumers as such. (Maybe if you asked for a sample, they'd send you one or two for free, as manufacturers tend to do for legitimate resellers.) Anyway, GOTEK makes the original device, but I've seen obviously the same technology in rebranded devices, sometimes identical, sometimes slightly modified... always more expensive than the simple one pictured here. I got mine for $12 (plus shipping from China) on Yahoo Auctions Japan; you could try e-Bay rather than buy off those expensive re-branders.