eBay has the LG V20 64GB No-Contract Android Smartphone for Sprint (Black) for $195 with free shipping. Features a 5.7" 2560x1440 touchscreen, Qualcomm Snapdragon 820 2.2GHz quad-core processor, 4GB RAM, 64GB internal storage, Bluetooth, 802.11ac wireless, 16-megapixel rear camera, 8-megapixel front camera, and Android OS 7.0 (Nougat).
eBay has the Samsung Galaxy Note 8 SM-N950F/DS 64GB Unlocked 6.3" Smartphone (Gold, Black or Gray) for $518 with free shipping. Retail price: $1300. Features Exynos 8895 Octa-Core, 6GB RAM, 64GB storage (microSD up to 256GB), 6.3" Super AMOLED (2960x1440), Dual 12MP cameras, 2160p @ 30 fps, 802.11ac, Bluetooth 5.0, USB Type-C, Iris scanner, fingerprint, Android 7.1.1.
Has good Amazon Reviews.
eBay has the Unlocked Apple iPhone 7 128GB Smartphone (several colors) open-box for $410 with free shipping. Retail price: $800.
eBay has the Samsung Galaxy S7 32GB Unlocked 5.1" Android Smartphone (Gold) refurbished for $145 with free shipping. List price: $650. Features Quad-Core (2x2.15 GHz Kryo & 2x1.6 GHz Kryo), 4GB RAM, 32GB Storage, 5.6" AMOLED display (1440x2560), 12MP camera, Android v6.0 OS. And has a microSD slot with a capacity of up to 200GB.
eBay has the Unlocked Galaxy S7 Edge 32GB LTE Phone (Silver or Gold) refurbished for $200 with free shipping. List price: $700. This water-resistant phone has Qualcomm Snapdragon 820 2.2GHz quad-core processor, 5.5" 2560x1440 (1440p) Super AMOLED touchscreen, 32GB internal storage, front- and rear-facing cameras.
eBay has the Unlocked Apple iPhone 7 32GB GSM Smartphone (Black or Rose Gold) refurbished for $280 with free shipping.