Cricket Wireless offers the Nokia Lumia 520 Windows Phone 8 for Cricket in four colors for $49.99. This $50 mail-in rebate drops the price to $0. (You must be enrolled in an active service plan to redeem the rebate; Cricket's no-contract plans start at $40 per month.) With free shipping, that's $90 under today's mention of an unlocked phone and $55 under the lowest total price we could find for AT&T's prepaid version. It features a 4" 800x480 touchscreen IPS LCD, Qualcomm Snapdragon 1GHz dual-core processor, 8GB internal storage, WiFi, Bluetooth, microSD card slot, and Windows Phone 8 OS. Rebate expires July 10.