Retailers are obligated to honour advertised prices. There was a Dell ad in a newspaper with an error in the price for a laptop that I was able to make them honour about 10 years ago. Keep your invoice once you get it. Here's a snippet from mine: Delivery Information for #: 863151101 | Order Date: November 18, 2014Shipped ItemsEst. ArrivalQtyItem PriceTotal PriceTax Code Dell 27 2560 x 1440 LED IPS Monitor <http://www.walmart.ca/canada-estore/catalog/productdetailpagecontainer.jsp?lang=en&skuId=6000189477881> UPC: 0088411609164 Thu 11/20/20141$259.97$259.97JRegulatory Fees Tv's 19-30" env fee for Dell 27 2560 x 1440 LED IPS Monitor1$12.25$12.25J Shipment SummaryItems Subtotal:$259.97Tv's 19-30" env fee J:$12.25HST 137466199 RT0001 @ 13.0%:$35.39Shipment Total:CA $307.61 Joe Murray, PhD President, JMA Consulting joe.murray@jmaconsulting.biz skype JosephPMurray twitter JoeMurray 416.466.1281