Costco is having a sale on their 21 pack of Pure Protein variety pack (3 flavors - 7 bars each).
for $13.99 plus taxes.Comes out to about $.67/bar.
Here is a link to the item itself although doesn't appear to be avertised on their website.
I posted below 2 screenshots of the choc PB flavored bars to check out ingredients etc.
the choc chewy and chip flavors tasted pretty good , the PB one was okay (not great) but Ive had worse.