Once you take online sales out of the equation, it seems to be a matter of wildly differing demand between one area and the next. Two weeks ago, I could find all the Fiocchi .223 50-round boxes I could carry at one local shop, but another was cleaned out. Now, the first is completely out of all .223, but the other was well-stocked with American Eagle .223 100-round boxes. In both cases, this was at normal "pre-panic" pricing. Of course, closer to a major metro area, there is NO ammo.
I've considered taking a drive this weekend to some of the rural shops I've bought ammo or mags at while headed out of town, just to see how supplies and prices compare.