batterytypehah!
Lord of the Dings
Go to a Goodwill store and buy all the $0.75 to $2.00 cameras you can. Most of them will have been dropped, and suffered some displacement of panels, levers, and switches. Batteries will have been left in from twenty years ago. People will have tried to work the controls, and messed things up. If you can bring some of those babies back to life, then it's time to step up to the next level. And sometimes you can find something really nice there.
PF
Maybe it's different where you are but all the Goodwill stores up here have is plasticky point-and-shoots. Occasionally a nice user among them (if still working) but all of them electronic wonders that were never intended to be repaired.
Goodwill switched to selling higher-grade cameras through ebay or their own auction site (shopgoodwill.com) long ago.