So much Yashica love here... 😀
None of my RF's have been anywhere near $50. My vote goes to the Yashica M - built like a tank (mine has clearly been dropped at least once), dead-simple to use selenium meter, no need for a battery, nice fast glass. A bit heavy, admittedly.
Sympathy vote - Voigtländer VF-101. Slower f/2.8 glass than many listed here, but cute as a button, compact, has a wonderfully simple aperture priority mode (actually, that's the only mode it has...) and a great in-viewfinder display. Uses sensible batteries, if rather a lot of them.
Second sympathy vote to the Minolta Hi-Matic 11, which has wonderful Rokkor-PF glass. Shutter priority and won't do a darn thing without a silly (i.e., PX675 or equivalent) battery in it, unfortunately. Also weighs a metric ton, but is otherwise a lovely camera.
Once I use my Lynx 5000, maybe my opinion will change...