If somehow it were to happen, such a price might have a good benefit. It might inhibit those who bought ammo cheap, in order to resell it.
When the ammo bubble starts to deflate, it will probably panic some of the actual scalpers who held it for too long (or could not sell).
When they finally get 'anxious', they won't buy any more and it will be much more available.
In July 2009, a single seller in Keene NH listed over 45,000 rds. of Russian 7.62x39 on Gunbroker, all at the same time.
I can't wait until these guys start to worry about their investments and greedy behavior.