Buying things in bulk can generally be pretty useful. I’m usually happier with the deals that I can get when I buy something in bulk, compared to what I’d be paying for something if I was buying it individually. In most cases, you can wind up getting a better deal, which is the kind of thing I’m always after.
One of my more recent bulk purchases was a great deal that I found on bulk motor oil. I discovered that I would be saving a significant amount of money by purchasing motor oil in bulk, which is good because I’m always going to need more of it, in order to continue performing maintenance on my boat.