Amazon has the 12-Count of Quest Nutrition 21g Protein Snack Bars, 2.12 oz. Bars (3 Flavor options: Cookies & Cream / Chocolate Chip Cookie Dough / S'mores) for $22.49 - 5% off with Subscribe & Save (can cancel anytime) - 25% off coupon (check “Save an extra” box, eligible on first S&S order for this product) = $15.74 with free shipping on $25+ or with Prime. Roughly $1.32 per bar.

Other flavors have the 25% coupon as well, but are priced slightly higher.