Got a $20 AZZ 1111137 from my brother-in-law (folded once) he didn't know...but its a keeper a couple weeks ago.
As Don says- interesting numbers should always be kept (no matter how frustrating).
Isn't that why we see so many interesting numbers for sale? I'm sure that non-collectors even put away an odd bill that think are interesting, forget about them, and then later sell them to a dealer who'll buy it because: a) its is old and probably in decent shape, and b) its got a cool number.