Amazing Wireless via eBay offers the Unlocked ZTE Axon M Z999 64GB Dual Screen GSM Android Phone in Carbon Black for $249.99 with free shipping. That's the best price we could find by $79. Features include:
5.2" 1920x1080 (1080p) display
Qualcomm Snapdragon 2.15GHz + 1.6GHz dual-core processors
20MP rear camera
4GB RAM, 64GB internal storage
Android 7.1 (Nougat)
You very likely are putting your laptop battery into an early grave.