I think, there are two kinds of Minox 35's - ones are troublefree and others are troublesome. When buying, ask for first 😀
I bought "defect 35 EL" - which I got back to life, but it had broken top cover and I yet managed to fly small spring under shutter release out in the surroundings. Coiled one myself, adjusted contacts, taped top to body, got it working. During test roll cover again managed to get loose as I can't put tape over advance lever. Probably I have to set it on glue.
But I love concept of tiny, aperture priority camera! If you manage to get properly working one, and like 35mm FOV, you'll enjoy it. It definitely is a milestone camera.