Got handed down a MacBook Air with small keyboard flaws

As the title states I got handed down a 2022 MacBook Air w/ a keyboard that has 3-4 keys that don't work after coffee being spilled on the keyboard. Other than that the computer works flawlessly.

I've gotten it estimated to fix for $400, which I'll spend as the last ditch effort, but I'm curious if there's any cheaper options out there.

Thanks!