For Prime members only, Amazon offers the QuestBar Protein Bar 12-Pack in Double Chocolate Chunk for $19.04. Add it to your cart via Subscribe and Save and it drops to $18.09. With free shipping, that's the lowest total price we could find now by $7, although we saw it in another flavor for a buck less in June.

Be sure to cancel Subscribe & Save once your order ships to avoid being billed for subsequent shipments.