From 9to5Toys.com: Sprint today dropped the price of the iPhone 4S yet again. The nation’s third-largest carrier now offers a free $100 American Express Reward Card (ships in 8-10 weeks) along with the purchase of the 16GB iPhone 4S for $149.99 with a two-year plan online (including free activation and shipping). This makes for the best deal on the iPhone 4S we have seen (at only $50!), beating out Sprint’s offering last week, which did not include the gift card. Other retailers and carriers have also dropped the price of the iPhone 4S over the past few weeks, offering the base model for $149.99 in most cases. We also learned last week that Apple has made price matching available in its retail stores, allowing customers to get up to $50 off each iPhone 4S model. Today Business Insider has learned that as a part of its price matching program, it will give a $100 Apple Store gift card to honor Sprint’s new deal.

The price drops have occurred in anticipation for the launch of Apple’s sixth-generation iPhone. Several reports indicated that Apple plans to launch the new iPhone Sept. 12, with the device shipping Sept. 21. It is also believed pre-orders for the device will begin Sept. 12. [9to5toys]