It's always cheaper (and healthier) to buy fresh produce than prepackaged or processed fruits and veggies, but you can get burned by buying out-of-season produce at a grocery store -- it's always more expensive because of shipping and fuel costs. But supermarkets stock everything, all year round, so how do you know what's in season in your area? Shop at your local farmers market. The produce is never going to be cheaper than the stock at your local grocery store. But it's usually well-priced, and it always feels good to know that your money is going straight to the farmer.