Cafago offers the Unlocked Xiaomi 6 Mi6 64GB Dual-SIM 4G LTE MIUI Smartphone in Black for $541.21. Coupon code "ZPZ4164" cuts that to $385. With free shipping, that's the lowest price we could find by $97. Features include a Snapdragon 835 2.45GHz 8-core processor, 5.15" 1920x1080 LCD, 6GB RAM, 64GB internal storage, 12-megapixel rear camera, 8-megapixel front-facing camera, 802.11ac wireless, Bluetooth 5.0, fingerprint ID, USB Type-C charging port, and MIUI OS.