Or, for that matter, how are we to know whether or not any given person isn't simply buying as part of a capitalist venture...you know, that thing so many of us espouse as being "American as apple pie"?
actually its market manipulation by artificially limiting supply on a local level in order to increase the deficit in regards to demand for the sole purpose of making a profit on it. Its no different than a store saying one left and marking an item up when they have a stock room full of them in the back, but they're only putting one out at a time.
I say let them.. people paying that much are propping up the market, which encourages this behavior. Obviously the guys buying for their own use aren't the problem.. its the guys buying just to sell at massive profits that are part of the problem (and the people enabling them by paying ridiculous profits). Dry up the demand.. and the market will correct itself. When these guys cant buy up walmart and make huge profits when they re-sell it.. they'll stop doing it (and be stocked up on 22 if they have one).