PP, this is the thing with the CSA - you enter into the farmer's risk with the farmer. So if there is a ton of corn, you get a ton of corn. If the corn fails...no corn for you. So if you are someone who wants what you want when you want it, and you would be bummed out by, say, four weeks of non-stop peppers and not enough tomatoes, you really should go to the farmers market and buy what you need. It still supports the farmers, just in a different way. The reason it can be cost effective is that you accept the risk and also give up control of how much corn you eat, to some extent. If you can do that, it makes financial sense.