BigDeals via eBay offers the refurbished Unlocked Nokia Lumia 521 4G GSM Windows Phone 8 for T-Mobile for $49.99 with free shipping. That's tied with our refurb mention from a month ago as the lowest total price we've seen for an unlocked model. (It's also a current price low for a refurb by $5, and for a new unit by $14.) It features a Qualcomm Snapdragon S4 1GHz dual-core processor, 4" 800x480 IPS LCD, 512MB RAM, 8GB internal memory, 5-megapixel camera, microSD slot, WiFi, Bluetooth, and Microsoft Windows Phone 8 OS. Deal ends January 14 at 11 am ET.

Note: No warranty information is provided.