There is an old saying all over the world, in fact there are quite a few sayings:
You get what you pay for.
If it's too good to be true then often it is.
I find this story therefore quite funny
"From TFA: 'A Russian friend .... works at a hard-drive repair center in a Russian town, located near the Chinese border. A couple of days ago a customer brought a broken 500GB USB-drive that he had bought in a Chinese store across the river, for an insanely low price. But the drive was not working: if you, say, save a movie onto the drive, playing the saved movie back resulted in replaying just the last 5 minutes of the film.' Apparently, the contents of the external HDD box included: two nuts, glued to the inner surface of the box with a 128MB flash drive wedged between them (image). And it was a clever hack, too — if ever an attempt was made to write a file that's too large, it got cycled — rewriting itself over and over from the beginning, while leaving the existing files intact. And it reported everything correctly — file sizes and all!"
Yes yes there is a lot of counterfeit shit from China, soy sauce, tofu, eggs etc the list goes on and on. But what do you expect when you pay an insanely low price for something. Buyer beware and check things carefully! The cheapish parachutes I buy I check before I jump the damned things!