We don’t have case lot sales in my area. The stores here know they can pretty much get whatever price they set.
I have noticed the cost of food out West is much cheaper than it is here. Well at least fruits and vegetables.
I check out what Aldi’s advertises everyweek, online. When you first check it out, it is on default of Texas. You can look at that ad, then compared against the area where I am, the price difference is huge.
But I mostly grow my own. (Except citrus). That helps tremendously.