Prime members only. Amazon has the 20% Off $50+ Purchase of select Amazon Brand Items promo with the discount shown on the product page. Shipping is free. S&S discounts and coupons stack as well, when available. 

For example, the pictured 100-Pack Solimo Kona Blend Coffee Pods are $30.26. Add two to cart for $60.52 - 5% off with Subscribe & Save (can cancel anytime) - 20% off $50+ promo = $45.39 (or around 23 cents per K-Cup).