I have purchased Furutech rhodium power plugs and recently a Furutech HDMI cable from Japan sellers on ebay and have never had a problem. The items delivered were real Furutech items. However, there are still going to be a high number of FAKE products from a variety of japanese and chinese (mostly chinese) sellers.
NOTE: the HDMI cable I got came in a very nice Furutech padded box. It did not have documentation (but who needs documentation for a cable?!?)_
NOTE: the HDMI cable I got came in a very nice Furutech padded box. It did not have documentation (but who needs documentation for a cable?!?)_