Ali Baba

They are counterfeit, but I am not sure if all of them are junk.  Looking at this one currently:  

i'd surmise that almost all of the deeply-discounted western-branded gear on ali is counterfeit, in the sense of not being authorized by or sold for the account of the brand.  however, broadly speaking you find three types of counterfeit products--(a) junk which has no relation to the real thing but simply has a (fake) brand label, (b) cloned products which are meticulous copies of the real thing, and (c) actual, identical products sold out the back door by the brand's contract manufacturer. i've heard some of the cloned stuff--e.g. a "naim" amp and sennheiser earphone replicants--which are sold for a fraction of the real thing, and much of it sounded purty damn good. of course, none of this addresses the ethical and legal aspects of buying the copies, but the quality can be surprisingly excellent. 

Buyer Beware purchased a $ 13 knockoff(looked legit from the outside) of a few hundred dollar  Cardas interconnect just to see what's up.  Junk is what's up. Note it would send my amp into clipping, weird. Took the interconnect  apart poor soldering, burnt through pin from heat, barley any copper wire. it has been recycled so some good can come from it lol.

Buyer beware, but generally, if it is too good to be true, it is.  You will not get a close facsimile of a $4K product with a $10 copy.  As @loomisjohnson said, there are 3 types of counterfeit products, this I believe this is true. 

I have heard from my brother, who is not in the audio business, he approached and has also been approached by factories that make the real thing and try to sell him an identical copy.