If you are into saving seeds and planting heirlooms, you may want to look into becoming a Seed Saver Exchange Member.
Seed Savers Exchange is a nonprofit membership organization whose mission is to protect North America’s diverse, but endangered, garden heritage by building a network of people who are committed to collecting, conserving and sharing heirloom seeds and plants.
Included in your membership is a catalog, a quarterly magazine with a magnitude of information as well as a discount on seed purchases!
…and of course, you can peruse and purchase their seeds without membership too.