A great source of seeds can be your local library if they maintain a seed bank, especially since you’re not likely to find anything in stores now.  Lisle has lots of vegetables, herbs and flower seed packets for free and all they ask is that you return the empty packets sometime before the end of January (they’re checked out to your card like any other material).  A great deal for those of us who use AeroGardens or other hydroponic systems and grow lights during colder months.