CowBoom offers the used Insignia Flex 10.1" 32GB WiFi Android Tablet in Silver/White, model no. NS-P10A6100, for $49.99 with free shipping. (Some are listed for a few bucks less in worse condition.) That's $100 less than the best price we could find for a new one. It features a MTK8127B 1.3GHz quad-core processor, 10.1" 1280x800 touchscreen, 1GB RAM, 2-megapixel front-facing camera, 802.11n wireless, Bluetooth, USB, and Android 5.0 (Lollipop).

No warranty information is provided. Note that cables and power adapter may not be included.