Best Buy again has launched iPhone trade-in promotion that will be running today till August 18th. The promotion will allow customers to bring in good condition iPhone 4S and get a gift card towards an iPhone 5 at least $200 to sign with AT&T, Sprint, or Verizon with 2 years agreement. If you currently have iPhone 4, you can get it at minimum $100 discount. It looks like Best Buy is trying to clear out old stock and getting ready for announcement of new iPhones next month.
Source: Best Buy