You might remember the deal that Best Buy had a few weeks ago; at that time, you could trade in your working Apple iPhone 4 or Apple iPhone 4S and get a gift card for $150. Thanks to a $50 discount, that turned out to be exactly the price of the 16GB Apple iPhone 5 at the big box retailer. Essentially, you were trading in your Apple iPhone 4 or Apple iPhone 4S for the Apple iPhone 5...
Source: http://www.phonearena.com/news/Trade-in-your-Apple-iPhone-4S-or-iPhone-4-toward-an-Apple-iPhone-5-through-Sunday-at-Best-Buy_id46501
Source: http://www.phonearena.com/news/Trade-in-your-Apple-iPhone-4S-or-iPhone-4-toward-an-Apple-iPhone-5-through-Sunday-at-Best-Buy_id46501