Now that you mention it, I never bother to discard older colognes, they just collect dust. Some are probably syrup by now, but I've got a timeline of colognes from the 70s to now:
British Sterling
Jovan Musk
Chaps (terrible)
Drakkar Noir
Pierre Cardin (ugh)
Polo
Stetson
Halston Z-14
Coolwater
and now the Armani Code.