Keys on keyboard

Last time when i was cleaning my laptop the vacuum cleaner sucked up one of my keyboard keys.
Today I am ripping apart the very same laptop as the Mobo had died. My recommendation is to keep the keyboard from old laptops because if you ever lose a key on your new laptop you don't have to go on ebay or pay $60 for a new set of keys.

Provided the keys are designed the same in both new and old laptops.