It seems to me, and I may be mistaken, that most vendors are continually out of stock on high-end Genesis RBAs ... themselves fueling the knock-off product market. Try getting a Z Atty Pro from Provape ... permanently out of stock. So China comes to the rescue and fills in the blanks.it is a bit of a conundrum, you dont want to spend alot of money on something that you might not like, but then again a quality device imo is easier to get right. for me anyways, the 2 cheapy clone gennys that i own, or had owned were alot more difficult to get right than my other quality devices. currently my ac-9 is by far the best genny that i have ever tried, and by far the easiest to get right.
I remember way back in the 70's K-Mart used to stock top-notch German bicycle repair goods which sometime later became sparsely available for about 2 years. After that, everything they stocked came from Taiwan -- they can't match the quality, but they can deliver.