I never thought I'd ever buy .22lr ammo for less than 2 cents each, but I pretty much have a long term supply now. I picked up 8,000 rounds of the Federal "Black Pack" ammo on a black Friday special. I already submitted the online rebate, comes to about 94 cents per 50 round box, after rebate. That's about the cheapest I ever remember paying when I started shooting back in the 80's, and 94 cents was a lot more money back then.
Not that I worry much about the cost of 22 ammo. I really don't shoot in enough quantity for it to matter much. 8k rounds will probably last me at least a decade or two, depending on how much my kids are interested in shooting.