I was interested to be told about the Real Seed Company which sells seed it has grown itself for non-hybrid and non-GMO vegetable varieties. Most have stood the test of time and the taste test of their family. They also encourage seed saving and swapping.
I’ll probably give them a go.
This year I saved seed from pea, french bean (Blue Coco, a Garden Organic heritage variety that did really well in a difficult summer when my runner beans failed entirely), scorzonera and a couple of others. Also hollyhock flowers and the gazanias from my niece’s wedding. I’ll see how they go next year.