>> I prefer to start them from seed because I am picky about what cultivars to grow and I want to control, when possible, that I don't use GMO varieties.
There are no GMO tomatoes commercially available in the US at this time. There have been none since the "Flavr Savr" variety ceased production in 1997
Since any others are still being researched and not yet gone to trials, I would expect it to be multiple years, or many years before another GMO tomato is licensed for commercial sale.
Even then, GMO seeds only go to large commercial growers who sign lots of papers to swear that they will never save or sell seeds. I doubt it has ever been possible for home gardeners to buy any GMO seeds. Seed companies that "pledge" not to sell GMO seeds might as well pledge not to sell unicorn hair or plutonium - they can't sell what they can't get their hands on.
Were the 'Flavr Savr' seeds fertile and OP? If so, and if some perverse hobbyist saved those seeds and traded them without any Calgene or Monsanto lawyers finding out, someone MIGHT have gotten their hands on a GMO tomato seed 16-17 years ago.
