Can you point to a reliable retailer that's selling an unlocked Lumia 520 for $70 ?
The MSRP on Lumia 520 > MSRP on Moto E. It's possible that some e-tailers might give you a good discount on 520 because it's more than a year old. The price on unlocked Lumia 520 that I see is $110. http://www.amazon.com/Nokia-Lumia-Unlocked-Windows-Phone/dp/...