A lot of things I got have been from “no-name” suppliers. Things like usb charging boards, boost converters, power-resistors, etc., little doodads like that to just lego together into bigger things.

But yeah, ABSOLUTELY test them as soon as you can. I ordered some 2000K car-bulbs from someone on AX just to grab the LEDs from them, figuring “how can they screw that up??”. By sending 6500K ones, that’s how. By the time I poked’n’prodded them, and was horrified at the Angry Blue™ light filling the room, it was about 2 days over the piss’n’moan time-limit.