Target sells several 6-count Pure Protein High Protein Bars for $6.29 each (prices may vary), my local stores had these choices:

Chocolate Peanut Butter
Chewy Chocolate Chip
S'mores
Chocolate Deluxe
Peanut Butter Carmel Surprise

Print $2.00 off Target Coupon here:
Target Coupon [target.com]

Sign up for Pure Protein's Newsletter and they will email you a link to a printable $1.00 off coupon (this is a unique bar code). Find the sign up page here:
Pure Protein Newsleter [pureprotein.net]

Target allows you to stack a store coupon and manufacturer's coupon. Final price $6.29-$2-$1=$3.29 or about $0.55 a bar. By contrast, Amazon is about $.89-$.99 a bar with subscribe and save.

I was able to print both coupons twice. You can also use the coupons toward protein powder or other non-single serve PP items.