This note is not in very good shape, but I don't see many 50's so when I saw this one, I knew I should keep it. Show everyone the ones you saved out of circulation. It does not have to be a $50.
I realize "to each his own" when it comes to what one keeps or throws back in the wild for special # but I normally don't keep my circulated repeaters. I do keep the odd circulated radars & low numbers: Most of these are tough numbers I just cannot part with, such as the above 0002000 note (since I rarely see them in much better shape as well).