> we are unfortunately not able to guarantee bootloader unlocking, as it is not feasible for us to search through thousands of devices in order to find one that is

Ohhhh, is that how it works? Maybe I should try that next time. Instead of selling broken hardware as "NOT TESTED, AS IS, PARTS MACHINE" I should sell them as "100% working!" and when someone asks, I'll tell them "sorry, it's not feasible to search through all devices and find the working ones"