Excerpt from the full article:
A heirloom tomato (called a heritage tomato in the UK) is an open-pollinated (non-hybrid) cultivated variety of tomato that can be grown from seed. Conventional hybrid tomatoes bought from your local grocery store, however, cannot be grown from the seeds you would save from them.
I figure, what’s the point of paying for and supporting parts of the food chain that are not self sustainable? Besides, heirloom tomatoes are very tasty fruits that are easy to grow and it’s free to save the seeds for the next growing season.