For Prime members only, Amazon offers the Nature Valley Chewy Protein Bar 5-Count Box 6-Pack (30 bars total) in Peanut Butter Dark Chocolate for $11.99 with free shipping via the directions below. That's about $9 less than you could expect to pay in local stores for this quantity. To get this deal:

1. View the Nature Valley Chewy Protein Bars 5-Count Box 6-Pack for $15.99
2. clip the 20% off coupon
3. add it to your cart via Subscribe & Save for a final price of $11.99