Someone asked me the other day about buying used computer parts. I recommend it actually, although I more frequently buy the whole computer. But you can save a lot of money and get higher quality by buying used computer parts.
The main concern I have with buying used parts is whether the CPU or the video card have been overclocked, and how much did that cut into their life expectancy. Then again, the way parts depreciate, I can appreciate the argument that the price makes it worth the risk.
The other risk is worn-out hard drives. When considering any hard drive, see if Backblaze has anything to say about that particular model. Hard drives tend to get the same kind of brand loyalty as pickup trucks, but hard drive reliability tends to be cyclical. Seagate had a run in the previous decade where it could do no wrong. This decade’s been pretty tough, though. Western Digital never had a bad decade, but they’ve had tough cycles here and there as well.
I have no problem with buying used motherboards from brands I trust like Asus and Gigabyte. I’ll gladly buy used memory as long as it’s name brand. And I don’t worry about AMD vs. Intel when it comes to CPUs.
I generally hunt for parts on Ebay. Once I get the computer parts and assemble them into a working computer, I burn it in. By buying name brand parts carefully and burning them in, my computers are at least as reliable as Toyotas. Maybe more.