I just bought some more low-carb protein bars (my favorite), Power Crunch at Vitacost.com. All flavors!
They are already cheaper by the box, at under $15, but you get more off up until midnight tonight (11/26) with the promo code of SAVEBIG. I just saved about $5 a box. If you buy anything over $49, the shipping is free.
They also have low-carb baking products and gluten-free too.