Here's another vote for the 24/2.8.... for years it was my "standard lens" as I didn't even own the 50! And they are definitely available for $100 or less if you're patient. But absolutely we wary of (or even outright avoid) the older ones with the circle emblem instead of the "A" at the auto position on the aperture ring. Many of those suffered from element separation on the rear element. If you see one advertised as "smudge on rear element" or whatever, RUN AWAY! Unfixable unless you have another rear element from a later lens to swap in.
Originally Posted by LowriderS10