That's funny...until last year, my parents' spice rack included things from as far back as when they moved into the house (1970). Finally my mom cleaned it out and got all new ones.

They're not big spice users, as can imagine!

Personally - I'm totally neurotic about milk (it's gone the day after expiration, whether or not it smells bad) and less so about other things. Pickles I would probably keep indefinitely - I mean, after all, isn't the point of pickling something so that it is preserved for a long time?