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 $48 under our May mention of a new unlocked, no-contract model and the lowest total price we've seen for an unlocked model. (It's also $10 under the best price we could find for a new one.) 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 December 10 at 10 am ET.

Note: No warranty information is provided.