Radioman, that price might be a bit dated. I was in the MHT Wallyworld last week, and they had beaucoup WWB 9mm (almost 30 boxes; I left 20), but the price was $23.97/100. Not a bad price by today's standards, but I didn't see any Federal 9mm, and I have a hard time believing it would have been that much cheaper. Prices have nudged up in just the last two months.
Online ammo buying is like our version of playing the commodities market: deals appear and disappear pretty fast. A little over a week ago I bought 2000 rounds of Independence 9mm at $235/1K shipped, and they had PMC at the same price, but this week PSA is out-of-stock on the Independence (My fault? Oops.) and PMC, but has Fiocchi at $257/1K shipped. This week Widener's and AIM have Tula 9mm 115gr FMJ (steel case Russian) for $213/1K shipped, but no brass cased 9mm at all. Next week? Who knows.
It's a fast-breaking ballgame, and a bit of online research time can save some serious bucks in ammo. Kind of fun, too, in a bizarre way.