Better to buy a couple of roots. I am trying asparagus seeds this year, because I have an old asparagus bed, that needs to be redone.I grow tomatoes every year. I planted asparagus seeds two years ago and got nothing - I'm guessing the animals got to them or something. Maybe try planting the crowns?
I'll try the heritage beans.
For dry bush beens the 2 best varieties I have grown are "Black Cocoa" and "Irish Creek Annie"
A good place for heritage seeds is "Salt Spring Seeds".