Walmart has a Price Match Guarantee!. It is best to have a copy on hand in case they question you on anything! I have had to Whip it out a few times! You can download a copy the the bottom of the page

Our Ad Match Guarantee

We’re committed to providing low prices every day. On everything. So if you find a lower advertised price on an identical product, tell us and we’ll match it. Right at the register.

We gladly match the price in the following types of ads:*

Buy one, get one free ads with a specified price
- Example: Buy one for $2.49, get one free (BOGO)
Competitors’ ads that feature a specific item for a specified price.
Preferred shopping card prices for specific items that are in a printed ad.
For fresh produce and meat items when the price is offered in the same unit type (lb. for lb.; each for each)

*The following are guidelines and limitations:

We will match any local competitor’s advertised price.
We do not require customers to have the ad with them to honor a competitor’s ad.
Items purchased must be identical to the ad (size, quantity, brand, flavor, color, etc.)

We DO NOT match the price in the following types of competitor ads:

Items that require a separate purchase to get the ad price
- example: “Buy [item A] to get [item B] for $C”
Items with no actual price that require a purchase to get free product
- example: “Buy both [items A & B] to get [item C] for free”
Items that require a purchase to get a competitors’ gift card
- example: “Buy [item A] to get a $B gift card
Buy one, get one free (BOGO) ads with no actual price given
Going out of business or closeout prices
Percentage off
- example: “All mascara, 40% off”
Competitors’ private label price promotions