Found this gem of a listing while scrolling through marketplace. Not only are they selling an invasive plant, they are asking $25 for a biennial plant that is already in its second year.
Last year a coworker and I rediscovered some Mead's Milkweed plants at my work that had not observed since 2005. They were originally planted in 1994 as part of a 7 year statewide study. I hand pollinated the flowers and was able to successfully produce one viable pod which I handed off to our plant propagation team last fall.
Out of 37 seeds that we got from the seed pod, 25 have germinated so far.
Edit: I just looked at the research paper and they were originally planted in 1994, not 1990