You have no idea when, or at what price CZ sold the kits to Preppers. For all you know, they bought a truckload six months ago when they were plentiful and now they are reaping the profit from their foresight.
Whether I'm an 'idiot' in your eyes or not, it is exactly a supply and demand issue, the very same thing that drives food and other commodity prices up and down with the market.
If you don't want to pay Preppers' price, you don't have to, but you won't be getting a stock anywhere else it soon seems; same as me having to do without prime rib if I don't want to pay what my local grocer charges.