Even though sales of the new iPhone models have already rocketed to the top of every major wireless carrier, Best Buy might be looking to convert any stragglers that are still reluctant to switch to Apple. According to an internal document leaked by TechnoBuffalo, Best Buy will be running a promotion from October 13th to October 19th which will offer anyone who trades in a working smartphone a minimum $100 Best Buy gift card in order to purchase an iPhone 5s or iPhone 5c with a two-year activation. The offer states that the smartphone being traded in “must be undamaged (no cracked screen or liquid damage) and in working condition to qualify.” If no iPhones are in stock, the offer is still valid for reservations as well.