There are also plenty of used CPUs of older models, but those tend to be fine since they don't really die unless abused (or are certain Intel 13th and 14th gen models...) and were probably run at stock settings for the few years the server it was in was warrantied for before being sent to recycling (creating tons of unnecessary waste, but good to see people have figured out how to encourage reuse while also profiting from it.)
I've also purchased used pre-Rowhammer RAM from there, and it was perfect too.
That's way too positive. Aliexpress is loaded with counterfeit products as well.