Are store bought seeds for hybrid tomato always F1?

[Oliver]

One thing I recommend is also doing a quick search here on Tomatoville for a variety you are interested in (like Cherokee Purple for instance), otherwise Tatiana's Tomatobase or even Dave's Garden will have some information on specific varieties. Another option is to start a thread about it. If you can find a tomato there are probably at least a few people here who can tell you about it.