The Prizm's rear view mirror day/night switch mechanism had stopped working and the mirror was very wobbly.
This package was waiting for me Friday when I got home.
A junkyard part from Maine, bought on eBay for $42, including shipping.
Edit: actually $32, including shipping.
So Saturday I started with the mirror, because I figured it would be easy. I was right. You just snap off the trim piece that covers the screws. And unscrew it. And install the new one the same way, but in reverse. I used a putty knife to snap off the trim piece without gouging it up like a screw driver might have done.
And here's the new mirror, installed.
It's great to have a working mirror again.