I've tried freezing tomatoes, and have found that they work well for sauces, etc. I might try freezing them if I can find a good deal. The prices I've seen on tomatoes locally hasn't been--so far--low enough. But I'm keeping my eyes open.
Another trick--although more work--would be making the tomatoes into something else to freeze. My parents had good luck with growing tomatoes one place we lived when I was very young, and my mother said that they'd preserve for winter by making either a frozen tomato sauce or paste. (I can't remember for sure which.) I can't imagine they saved much--we only had a freezer on the refrigerator. But it was a way of using up too many tomatoes, and extending the season a bit. My mother said that the sauce or paste was fabulous, so I can't imagine it lasted long in any case.
Freezing does have a real problem with possible loss due to power failure or civilization collapse. I know someone who told me about her family's practices. They love freezing corn on the cob--but she said they also can a lot of corn. Freezing would be an option, but power failures are so common that they want to be absolutely certain that they have a supply that will last no matter what happens.
