Yes I understand your logic. But good quality fakes of something this nature isn't a matter of someone slapping a box together. Counterfeit electronics are almost always extremely obvious whether it is from usage or small details. There are a small portion of high end, high quality fakes. But those are actually often advertised as high quality counterfeit, not as real products. That's because it requires volume for such an effort to be worth it.
In this instance, they are making an exact replica box, exact replica manual, everything sealed the same way, able to deliver similar sound performance, give a legit serial number and store a massive niche product.
It doesn't really fit the characteristics of Chinese counterfeit unless since they target popular brands like beats and Bose and when you buy fake beard online, they will straight up tell you because that market is big enough by itself. The most likely place to run into counterfeit at real prices is at tourist traps.
Saying this, I am also on guard myself because of how cheap this particular unit is. I can't assure its 100% real. But I don't want people to have an overly exaggerated view of the Chinese market, which is very different from how it was before the online markets emerged.