I have a budding addiction to Larabars that I've tempered so far by reminding myself how much they cost. Yikes.
Now, the $2.29 I've seen mentioned is a bit steeper than around here (New Mexico). Regular price at Wild Oats is $1.79, and they have been on sale a few times at $1.59. On top of that, when you buy a case of ANYTHING at Wild Oats they will bump 10% off the price (even if you mix flavors rather than just grab a case box off the shelf). That brings the unit cost down to about $1.43 plus tax. Not too bad for something that tastes so good.
The story behind Larabar is typical - she was on a backpacking trip and decided that the food she brought was gross and "why can't anyone make a bar that I like???", so after the trip she started experimenting. Usually the story includes a line about her burning through a dozen food processor motors - hehe - and finalizing the formulations.
Getting shelf life took a new wrapper technology, and then they were ready to sell.
No, I don't work for them. I just had a minor epiphany the very first bar I tried (banana cookie), and I spread the word when I can.
And, since $1.43 is still not that cheap, I of course have been experimenting with my own food processor now and then. :-)