Fastenall can sell it to you in 5, or 55 gallon. But you’re correct, it’s MORE expensive. Go figure.
We’ve done best by asking a local chain store what discount they can give us for buying gallon jugs in bulk (i.e. a pallet full)
There are several places I can buy them, that’s not really the issue. It’s just that they are always more expensive per ounce than just buying bottles. They’re not THAT much more convenient that I would be willing to pay more.