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 Light Roast Coffee Pods are $29.69. Add two to cart for $59.38 - 5% off with Subscribe & Save (can cancel anytime) - 20% off $50+ promo = $44.54 (or around 22 cents per K-Cup).