The price guarantee program is good on purchases made Nov. 1 through Dec. 25 that are available at a competitor's store within the same local market.
To get a gift card for the difference, customers must bring in their original receipt and the local competitor's printed ad before Dec. 25. Items placed on layaway are also eligible for the Christmas price guarantee.
The offer excludes Black Friday ads and Internet pricing, among other restrictions.
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http://money.cnn.com/2011/10/24/pf/walmart_shopping/