I also mistakenly put this in the old Prime Day thread. I'll put it here too.
Prime Pantry deal on King Arthur Unbleached Bread Flour if you want to stock up.
5 lb. priced @ $3.68. Cheaper than local Walmart price in my area
Then there's a 20% coupon to clip. It looks like this is only applied to 1 bag of flour per order.
Then if you buy 5 you get additional 5% off, buy 10 get additional 10%, buy 15 get additional 15%. You can buy 5,10, or 15 of various and assorted things and get the discounts, This stepped discount ends 11/30/19
Caveat: for free shipping you must have a minimum of $35 in your Pantry box.
I tested all the max discounts with a qty of 15 bags in my cart and it looks like it came out to $3.13 per bag, delivered. Not a bad price for bread flour to the door.
Edit: It looks like all the King Arthur flours on Prime Pantry have a 20% coupon, ie, organic, cake, gluten free......
Double Edit: US based Prime Pantry, I should add for clarification.