Hi danster,
If you are thinking of a rangefinder for below $100, I think the Yashica GSN is a good start. It's a real rangefinder with automatic parallax correction, automatic exposure, a fast and sharp lens and bright viewfinder/frameline. It's also quite rugged because I have dropped mine on tarmac and it still works like before(no rangefinder misalignment), but with some deep scratches on one corner of the baseplate.
e905591s