Before you head to the register, do a quick search of Walmart.com and Jet.com for the item you plan to buy. If it's available online for less, let the cashier know. Walmart will match the price for an identical item (size, model, quantity, brand, color, etc.) that's currently in stock. For online orders, Walmart.com matches prices on identical, in-stock products from 30 competitors, from Amazon to Walgreens.com. Be sure to contact customer care before placing an order to verify that the item is eligible.