If you buy replacement laptop keyboards, be sure to test them promptly, not just stockpile them as spares.

I started to see some poor-quality 'genuine' replacement ThinkPad keyboards. Bad action, bad fit of assembly with keycap catching on bezel, etc.

I considered it not-unlikely that no more good ones would be made, since Lenovo had stopped selling laptops that used that part.

So I stockpiled some good ones while I could, by sampling from a diversity of sellers. I wound up with 3 good spares, and 2 bad.