I am a bit of a packrat. Comes from growing up in a family that could not afford very many nice things.
So all my old cams are kept in a box, and I even keep failed cameras around for parts, like, imagine a shithead throws a rock and breaks a lens. A camera that just boot loops still has a good lens. One of the more common electronic failures have actually been just the PoE capability not working anymore, so we have two cams I can think of with that issue, and one of them is still in service being powered via its barrel connector.
And when the opportunity arises to donate one to a family cause, I start with the oldest and least desirable first. When the Ubiquiti AirCam (1st gen lol) supply ran out, it became Hikvision DS-2CD2032-I. Although one required a fair amount of zoom so they got a 2MP Dahua starlight varifocal. The model without a built in mic of course.