You can't buy 12 packs of knives for that price. Blades, maybe. $10 gets you 100 utility knife blades at Home Depot. You've got 6 snap-offs per Olfa blade. That's 6x12 = 60 blades for about a buck less (even though I'm only seeing 10 packs available). It's just a matter of budgets. I've been in the industry for over three decades and just telling you my anecdotal experience. I love Olfas and prefer them for some things. I already mentioned I use them. Was just making an observation based on what I know.
https://www.homedepot.com/p/Stanley-25mm-Heavy-Duty-Snap-Off-Blades-10-Pack-11-325T/202261985