This kind of shocks me because when I worked at Best Buy they would micro manage their margins like crazy. Hell, even the summer after the Wii was released I had a manager who refused to let us sell Wii's unless we could talk to customer and attach accessories and games then pull out the "I think we might've just received some" card. As a former retail person I'm all too familiar with the concept of using loss leaders to bring in customers, but if they're just doing this for any game they're eroding either most or all of their margin.
The hope is to make Best Buy their retail destination, but to take full advantage of this you're going to have to invest time into going to another retail store. For a typical consumer I can't imagine they're going to waste so much time for so little reward. They'll have to go into Gamestop or Game Crazy, find a used game they want, call or drive to the local Best Buy and see if they have the same title, hassle with the employee to price match, wait for them to approve or call the other store and then purchase the title. I have 2 Gamestop stores within 5 minutes of the same Best Buy and I'd just go ahead and buy the used game instead of going through all that hassle for a typical $5 in savings.
Whatever, I don't care. I the majority of my game shopping on Amazon now.
Step 1. Go to best buy and look at games.
Step 2. Find one you want.
Step 3. Call Gamestop and ask how much the title costs used.
Step 4. Take to register. Tell cashier to call Gamestop for price match.
doesnt seem very complicated to me.