I usually keep an older Olympus XA 35mm camera in my truck (previously, it was an XA III, but I found this one for $10 at a yard sale!) It's come in quite handy for those "wish I had a camera" sunsets & other such moments. It's also been of use, unfortunately, at a couple of minor wrecks.

However, I've about decided that keeping a Fuji or Kodak (or your favorite brand) of disposable camera may be the best way to go. It's basically nothing lost should it be lost or stolen, they're light, & take decent photos. I like my little Olympus too much to continue risking it.

You might have similar luck searching garage & yard sales. I've picked up several "junk" cameras that way. They're fully functional, just no longer desired by their owners.

David