I was walking through the garden center at Wal-Mart the other day and noticed they're now carrying heirloom seeds. This is the first time I can remember seeing them at our Wally World. They list at .97 cents per packet. They had a good mix of veggies and even snap dragon flowers.
I've had a lot of folks ask where to get these types of seeds, so they can save their seeds at the end of the season and be assured of getting the same thing they started with next season, so there's a good starting point.