I have a few thousand. I do admit I sometimes buy blades just to have something new to test out, and since ordering 100 from Amazon Prime isn't much more expensive than ordering a tuck from some of the online stores ( adding in shipping ) I've been known to order 100 just because.
That would generally describe me as well. Other than ordering sample packs of a couple blades each, it makes more sense economically to order in bulk packages of 100, mostly from Amazon.
As such, I have thirty types of blades that I have ordered in minimum quantities of 100. Some of these, I have in multiples of 100.
I gave up on Amazon Prime when the subscription went north of $100. But I still get free shipping on orders of $25 or more.
At this point, I believe it is safe to say that the majority of my bulk purchases are behind me. However, I will still throw in a sleeve or card of blades now and then to make a minimum order or when there is an attractive sale.
At this point, I have most of the blades I want. Though I will continue to buy a few more bulk packs here and there (for no particular reason).
I might explore some of the single edge options thus upcoming year?
Maybe another razor or two?