There is the world of speculators and also the world of swindlers, in these times of global crisis.
Example: before the crisis I bought the Kinetis MK66 in China at 6 dollars a piece (in Europe they cost more than 20 dollars), everything was correct. Now the Chinese either tell you that there is no stock or they give you exorbitant budgets, crazy, Kinetis MK66 at 214 and 270 dollars a piece.
What would happen if I make an order (which of course I'm not going to do at those prices), possibilities:
1.- Pay and receive nothing
2.- Pay and receive counterfeits that do not work
3.- Pay and receive used chips, whether they work or not.
I already had a case of chips that were sold to me as new and were used, half of them did not work. These were LSM9DS1 accelerometers. Bought at the beginning of the crisis, expensive, at four times the usual price, but the price was still acceptable. The worst thing was discovering that they were used, put under the microscope the new ones have gold pads, but these had silver ones and it was noticeable with traces of tin, also some encapsulated ones were noticeable with wear. After installing them on a few boards for a customer, more than half of them didn't work. The Chinese supplier was and continues to be a good supplier, but the supplier that supplied my supplier in this case was not, my supplier was deceived by his supplier, and indirectly I was also deceived.
Since the crisis began I have not bought any microcontroller from the Chinese, besides being very expensive, I do not trust, I am sure that almost all of them will be used, damaged and counterfeit.
As for the speculators, I have seen it because of the buying movements in Digikey or Mouser. I remember that Digikey put up for sale a stock of 1400 pieces of the H747, I was lucky enough to receive and read an email warning of stock at 3 AM, I quickly connected the computer and placed an order for 50 units, the next day I knew they had sold the rest of the 1400 pieces, and this has also happened with the same and other microcontrollers in the worst moments of this crisis. Those purchases so fast and in large quantities in one day could only have been made by companies or speculators.