The Nokia Lumia 520 is the best-selling Windows Phone, and if you are in USA you now have a chance to pick it up for a pittance.
Amazon is offering the AT&T handset for the next 3 hours only for an amazing $44.99 as part of their regular lightning deal promotion.
Grab it while you can at Amazon here.
Update: The deal is over now. However, you can get a No Contract Nokia Lumia 520 for AT&T + Free Case(worth $24.99) for $59 from Microsoft Store. Check out the deal here.
On a related note, Amazon is also offering great deals on HP Omni 10 full HD Windows tablet, Dell XPS 14 Ultrabook and more. Check out the details here.