Tracfone offers the refurbished Samsung Galaxy Core Prime Android Prepaid Smartphone for Tracfone for $29.99 with free overnight shipping. (That's $20 off.) It features a 1.2GHz quad-core processor, 4.5" 480x800 touchscreen, 8GB internal memory, front and rear cameras, 802.11n wireless, Bluetooth 4.0, microSD slot, and Android 4.4 (KitKat). Deal ends December 19.
Note: A 1-year Tracfone warranty applies.