I'm not faulting Leica. I have an M3 myself which I must get around to finishing one day. But Kostya had a point, and you have quoted a relevant portion of the thread starter's criteria, yourself. If one is looking for a not too pricey rangefinder to beat up that doesn't object to being dropped or banged around, an M is not exactly at the top of the list, is it, and whilst their finder prisms may take a belt in the face it's really not a good idea. As is my habit I was trying to respond to the question posed. Whether or not Leica Ms are well made, durable cameras wasn't it (and is not really in doubt, is it?). 🙂OP "Would be nice to have something i can kind of beat up and it'll still function fine, but not too pricey if it gets dropped or stolen."
Precision instruments aren't really designed to be dropped, or beaten up. If it happens in the course of your work, you get it repaired or you replace it. Like Phil, I've used Leica M's for decades without malfunction. As well, not every SLR (even Nikon) that gets dropped survives. So I also disagree with Ko.Fe's characterization. Even durable mechanical cameras are not indestructible, and you can't really fault them or their makers for that.
Cheers,
Brett