Microsoft Store offers the Nokia Lumia 520 4G 8GB Windows Prepaid Smartphone for AT&T GoPhone for $59 with free shipping. That's tied with our mention from last week as the lowest total price we could find by $11, although we saw it for $9 less on Cyber Monday. It features a 4" 800x480 IPS touchscreen LCD, Qualcomm Snapdragon 1GHz dual-core processor, 512MB RAM, 8GB internal memory, 5-megapixel rear camera, microSD, micro USB, 4G, Bluetooth 4.0, and Windows Phone 8 OS.
Note that although the product page says it's out of stock, it seems orders can still be placed.
For new MetroPCS customers only, Fry's Electronics still offers the no-contract Nokia Lumia 521 Prepaid Windows 8 Phone for MetroPCS in Black for $89.99. This $50 mail-in rebate cuts it to $39.99. With free shipping, that's tied with last week's mention for the lowest total price we've seen for this phone on any network. (It's also a current low for this model on any network by $40.) It features a Qualcomm Snapdragon S4 1GHz dual-core processor, 4" 800x480 IPS LCD, 512MB RAM, 8GB internal memory, microSD slot, WiFi, Bluetooth, and Microsoft Windows Phone 8 OS. Deal ends January 1.