When produce like berries are out of season, you can save a lot of money going to the frozen food case. For example, when blueberries aren't in season, fresh ones are picked before they're ripe to avoid getting blemished while traveling and are flown in from thousands of miles away. On top of that, they can cost $5 for just half a pint. For better taste and nutrition, berries in the frozen foods case can cost you less than half the price of fresh. This also holds true for veggies such as broccoli, green beans, edamame and corn.