[i5-2520M]

> So not the display nor the keyboard, the parts that most commonly need to be replaced.

I'm sorry but the most common part by far is the battery and maybe the SSD followed by RAM. The last 2 are usually upgrades, not repairs. I have done a decent number of WiFi card swaps as well, to get rid of unreliable Realtek and MTK cards. I have never had to do a screen or kb swap for any laptop in my family or friend group. Keep in mind this is all based on like 15-20 laptops I had come across in the last few years.