eBay has the Samsung Galaxy S6 32GB No-Contract 5.1" Smartphone (Black or White) refurbished for $135 with free shipping. Features Exynos 7420 8-Core (2.1GHz+1.5GHz), 3GB RAM, 32GB storage, 5.1" AMOLED (2560x1440), 16MP cam, 802.11ac, Android 5.0.2.
eBay has the Open-Box Unlocked Galaxy 8GB Android Phone, Black (Galaxy On5) for $70 with free shipping. Features Cortex-A7 quad-core 1.3GHz processor, 5" 1280x720 TFT touchscreen, 8GB storage, 8MP rear camera, 5MP front camera, Android 6.0 (Marshmallow).
Walmart has the Unlocked Apple iPhone 6 64GB Phone, Space Gray (MG4W2LL/ARW) refurbished for $155 with free shipping. List price: $264. Features 750 x 1334 pixel resolution with Ion-strengthened Glass, Oleophobic Coating, 8 Megapixel Camera with f/2.2, 29mm, phase detection autofocus, dual-LED (dual tone) flash.
eBay has the Unlocked LG Nexus 5X 16GB 4G LTE Android Smartphone (Black or Silver) refurbished for $190 with free shipping. Features 5.2" 1920x1080 (1080p) touchscreen LCD, Qualcomm Snapdragon 808 1.8GHz 6-core processor
2GB RAM, 12.3-megapixel rear camera, 5-megapixel front camera, and 4K video recording
USB Type-C, Android 6.0 OS (Marshmallow).
Amazon has the Unlocked Sony Xperia XZ1 32GB 4G LTE GSM Android Smartphone (Black) for $360 with free shipping. Features Qualcomm Snapdragon 835 octa-core processor, 4.6" 1280x720 IPS LCD touchscreen, 4GB RAM and 32GB storage, front- and rear-facing cameras, 802.11ac dual-band wireless, Bluetooth 5.0, microSDXC card slot and USB-C, Android OS 8.0.
Has good Amazon Reviews.