leicas can wear out, I suppose, but you have to be trying. Ditto Nikon and Canon pro-level cameras, of which there are now many for sale cheap. So I think your fear is overblown. There is a huge supply of very good usable equipment out there -- compared to digital professional cameras even used leicas are a bargain -- people know I'm into cameras and give me stuff. I'm about to take several kits to the local university photography program for students to use.