Huajia may be Hongdu in Chinese, just a guess. There was another seller(3 total) also on ebay that had them in the $350 range. You can google Hongdu and find numerous offers to sell lots that range from 10-50 in quanity. BGF obviously got a better deal. Didnt think I would like a friction drive, have had them in the past, but none have worked as well as this one, I guess because it has been perfected in design over the years. Am thinking of buying another one to have for a future project before they are all gone at BGFs price.