I recently purchased a Leica AF-C1 at a flea market. It was just sitting there. The seller didn't know if it worked so I got the camera for $10. For a Leica I was willing to take a flyer for only $10. Got home, loaded it with a new battery and it worked great.
This is a very basic point & shoot rangefinder camera. You simply slide the switch under the lens and the lens cover opens and the camera comes on. The default lens is f/2.8 40mm. There is a "TELE" button which switches the lens to a f/5.6 80mm zoom. When you push the TELE button the flash pops up to extend it above the 80mm lens. Just point and shoot.
A couple of issues, first is that the camera is quite noisy and secondly the focus is a bit slow. When the camera is in focus a little green light comes on in the viewfinder.
I've shot several rolls though the camera and it works great. Not the sharpest lens, but I totally enjoy shooting with it.
I took it with me to Los Angeles and loaded it with Ilford HP5+, Ilford XP2 400 Super & Lomography 400. All films work well. Here are a few photos using Ilford XP2 at Bombay Beach in the Salton Sea.