Most savvy shoppers are in the habit of comparing prices across retailers before making a purchase, but don't underestimate the value of comparing prices within the same company—website to store. Take this week's shopping triumph. I saved $120 on two pair of wedges at Banana Republic by calling them on their own price discrepancy. Online, the shoes, in black or nude, were originally $150, marked down to $100. In store, they were still full price, but at $120—$30 less than the original price listed online. What kind of game is that? When I pulled up bananarepublic.com on my phone to show the sales associate the price difference, an offer scrolled across the screen for 40 percent off orders of $200 or more. The store honored both the lower online price, and the 40 percent off. I ended up with two pair of wedges for the price of one. Thus, the bounce in my step today.