I have sorted a few thousand dollars worth of nickels and don't blink at anything newer than 1945 unless it is obviously a proof or something odd. Maybe I toss some that others would hang on to but that is what I do.
Oh and if you find any darker nickels from 58-59 or so, there was an error in the process that darkened them. They're called Black Beauties and if they're genuine, they're worth anywhere from a few to 20 bucks.