Amazon.com has the Planters Roasted and Salted Sunflowers Seeds, 7-oz. Bags (Count of 12) for $18.46 - 25% off coupon (Sign in and Click "Clip This Coupon" on product page) - Extra 5% off with Subscribe & Save (You may cancel it once the order is placed.) = $12.92. Shipping is free.
Amazon.com charges sales tax in KS, KY, ND, NY, WA.