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I'd be leery as well, no reviews, etc., and they say: "We will ship out your packages by HK AIR MAIL or CN AIR MAIL from China,or by EMS" so, I'd say you would be getting an OEM knock-off. In a quick perusal of the tuners, it also seems they specify compatibility (e.g., will fit in Grover holes, not Gotoh), not actual brand.
For the price difference on this kind of item, I'd rather buy from Sweetwater, etc., and have confidence that I got what I wanted.