I buy all sorts of fine parts off ebay/aliexpress. A lot from China. No issues so far. All work within expectations. But I'd never base a product on any of them

I buy all sorts of fine parts off ebay/aliexpress. A lot from China. No issues so far. All work within expectations. But I'd never base a product on any of them. Nor go fine tolerance / high expectation either. Not without very high trust. There is such a thing as a savvy* buyer who has a suspicious and not naive mind. Then again, hardware is a hobby for me. My level of "buyer beware" means a slew of parts cannot be purchased from ebay so maybe that is a factor? I can't fathom anyone using ebay for serious products that would be sold to a supported customer with any kind of actual warranty. The mind boggles. I have, however, dabbled with alixpress and found speaking Chinese useful to the extent I made a short run of my own gadgets with humble success. No I'm not a hardware company. Just had an issue that needed a gadget so I made it happen. * No flash memory or any similar memory devices. No FTDI gadgetry. No battery of any kind. Nothing that involves oddball power supplies. I parts bin any power supply "ebay-direct-from-China" as I don't trust any of them.