Key components like CPU, GPU, and RAM are mostly safe to buy used, and they can lead to significant savings. Do some research to figure out what parts you should buy and how much they should cost ...

Buying PC components at a store like Best Buy or Micro Center is easy. You pick what you want and take it to the register.

So, you start seeing signs that your computer is getting too old — the screen keeps freezing, the hardware starts making weird noises, and the system is unbearably slow. And now, you need a ...