Price matching, asking a store to sell an item for the same price as another store, is a way to get the best deal in town. It's also a way to get the exact item that you're looking for. For instance, if one store offers a great sale on a curtains but is out of the design you want, try another store that sells the same curtain. Even if the store with the sale has the curtains in stock but not the color you'd like, try another store that can price match. Here on some price matching tips for selected large chain stores.
Some prices, however, will not be matched. Percentages won't be matched, such as "10% off all Hanes socks." Leave these ads at home. Likewise, "buy one get one" sales are only good for price matching if a price is listed in the competitor's ad. For instance, if it says "BOGO 4/$10 reg 2/$10" then Walmart will match it. If it only says "BOGO on Hanes" then your price match won't happen.
This page contains the following solutions.
Most retailers have a published policy allowing customers a specific time frame to receive price adjustments and an unpublished policy that actually extends this time frame anywhere from 7 to 14 days.
If you do ad matching at Walmart, put all of your ad matching items on the bottom of your cart as you shop, then have them rung up first or last so you don't forget to keep them separate.
This is a page about understanding price adjustment policies. Sometimes after you purchase an item, you find it for less somewhere else.