In case you have not seen the commericals. If you purchase products at Walmart you can either scan your receipt with your phone using their savings catcher app or go to their website and punch in the code from your receipt. They will scan competitor prices in your area and reimburse (via an egiftcard) you any money you would have saved shopping somewhere else. We average $1 - $4 per receipt.
Details are at this site-
Walmart Savings Catcher
Details are at this site-
Walmart Savings Catcher