Not long ago, we were at our favorite discount grocery store. They sell a lot of stuff that was overstocked in other stores, or is nearing its expiration date, dented cans, and unlabeled frozen things (half the fun is figuring out what some of them are). In other words, they always have a lot of great deals to take advantage of.
I have to admit though, from time to time, I have given in to him and purchased one or two of those industrial size cans. A large can of pasta sauce, for instance, (unlike a giant can of jalapenos) can be opened, used to make a rich, thick sauce, and then frozen in batches. At $2.00 or $3.00 a can, that makes that particular can a good deal to take advantage of.