Yeah I'd be cautious about that. With some exceptions like tomato, I've had issues with viral load building up in otherwise apparently healthy seeds, specifically soybeans for edamame and other beans. Then of course you've got cross pollination issues with any thing brassica, or cucurbitacea.
Idk. I collect and sew some of my own seed, but I sure af wouldn't be planting any other growers seed unless I'm confident in their pollination skills as well as pest and disease management. I'd rather pay an annual dues to a seed library/ bank where I can draw from, but be guaranteed fresh seed (this is what we do for our friends/ community) from a reliable source.