I asked them through their contact email, can't remember my exact words, but pretty much,
Are you saying if I buy heirloom seeds from you and plant them and save seed from them for a year or two, I still can't trade or sell those seeds or the produce?
They responded:
Thank you for your email.
Any type of seed that is brought from Burpee or comes from the product of a Burpee seed you would not be able to sell or trade.
Regards,
Customer Service
www.burpee.com
1-800-888-1447
Do you think I misunderstood them?
If I sell the produce, the seed is in it.
And either way, I bought the seed. It's mine now. Why should they have any right to it once they've sold it to me?