Mobilepros1 via eBay offers the open-box Unlocked Sony Xperia Z 16GB 4G LTE GSM Android Smartphone in Black or Purple, model no. C6606, for $99.99 with free shipping. That's $5 under our August mention of a refurb for T-Mobile and the lowest total price we've seen. (It's $75 below the best price we could find for a new unit.) It features a Mediatek MT6572M 1GHz dual-core processor, 5" 1920x1080 touchscreen, 16GB internal storage, 2GB RAM, 13.1-megapixel rear-facing camera, 2.2-megapixel front-facing camera, 1080p video recording, 802.11n wireless, Bluetooth 4.0, and Android 5.1 OS (Lollipop).

Of note, no warranty information is provided.