Walmart offers the LG Tribute HD 16GB 4G LTE No-Contract Android Phone for Boost Mobile in White for $49 with free shipping. That's the lowest price we could find by $16, outside of the mention below. Features include a Qualcomm Snapdragon 210 1.3GHz quad-core processor, 5" IPS LCD, 1.5GB RAM, 16GB storage, 8-megapixel rear camera, 5-megapixel front-facing camera, Bluetooth 4.1, microSD slot, and Android 6.0 OS (Marshmallow).

A close price: Shopcelldeals via eBay has it for $49.99 with free shipping.