Samsung via eBay offers the Unlocked Samsung Galaxy S8+ 6.2" 64GB 4G LTE GSM Android Smartphone in Midnight Black for $639.99 with free shipping. That's $10 under last week's mention and the lowest price we could find today by $35. It features an 8-core (2.3GHz Quad + 1.7GHz Quad) processor, 6.2" 2960x1440 touchscreen Super AMOLED LCD, 4GB RAM, 64GB internal storage, 12-megapixel rear-facing cameras, 8-megapixel front-facing camera, 4K video recording at 30fps, 802.11ac wireless, Bluetooth 5.0, microSD card slot, water-resistance, and Android 7.0 (Nougat).