Apparently a lot of people have been buying, as Mountain House had a shortage of freeze dried meals a while back due to people placing bulk orders like this. For a little while they weren't accepting any more orders.

There has been a surge in large scale prepping lately, mostly thanks to events like Katrina, the Japanese Earthquake/Tsunami, and the whole 2012 Mayan Apocalypse thing. You've got more people building bunkers and bomb shelters now than any time since the Cold War. If you're taking the time and money to build your own bunker, stocking it with $3,200 worth of food is a relatively minor expense.