Sprint tacks on Buyback option to web, offers tradein credit while online shopping

Sprint's Buyback program has been up and running for a bit, but now the wireless carrier is offering trade-ins alongside online purchases. While selecting your brand spanking new smartphone of choice, the outfit will automatically guide you through the process to determine how much your old handset is worth and keep track of the total credit for multiple devices -- with a $300 maximum for the account credit. After the tech is tallied up, a pre-paid shipping label will be emailed out for shipping. Of course, the exact amount of the Buyback deal won't be confirmed until Sprint receives your package and gives its contents the once over.