Use the search bar or the departments tab in the header to find the item(s) you are looking for.
On the product page view all the different prices that all the top retailers are selling that item for. See who is selling it for less.
See the price you would pay after price matching and which is the cheapest retailer to price match at, based on their respective policies.
Visit the retailer shown in the product page to price match and pay the lowest price possible.