Hey Jordan, you're right, it's hard to put a 24mm lens into that mix and have it come in under $200. The problem with many systems like Nikon, Olympus, Pentax, Minolta (Maxxum), even M42, is that the lenses can be used on digitals (though some only with adapters). This keeps the prices higher. Look for a system that can't be used on digital, and maybe one that was never common.
nonsense! there are quite a few 24mm lenses sold on ebay for under $100. That includes nikkors, canon fds, and minoltas. Olympus and Pentax tend to go for a bit more. Alternative manfacturers are seen for under $50 sometimes.