Amazon has the new HTC One 4G LTE Full HD Android Smartphone for Sprint (2013) (Silver or Black) for $20 with free shipping. 2-year agreement for new customers required. For current customers, it's $50 shipped as an upgrade. It's still $100 if you get it directly from Sprint.
1.7GHz Quad Core CPU, 2GB RAM, 32GB storage, Wi-Fi, BT 4.0 4.7" (1080x1920), Ultrapixel camera, 1080p video, Android 4.1
$20 retail: $100Report