Well, ZAZA's done it to me.
I always thought my maximum blade purchase would be 10 (i.e. one 10pack or two 5packs) of any blade. Today, after my 3rd shave with the wonderful ZAZA... I purchased 100!
My minimalist self is screaming "Morpheus, you have found The One."
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My current record of comfortable shaves with my previous love, the Personna Red, is 31... and I usually average one shave every two days (two per day if I want to be really smart or up to once every four days when in stubble/mini-beard/hobo mood). If the ZAZAs last as long as the Personna Reds (bearing in mind that I'm getting longer blade life as my technique improves), that 100 should last me at least 17 years!
That 100 cost me £8 GBP ($11.50 USD) including shipping from a Turkish eBayer (and that was his last 100 pack).
He will get you more if you ask him.