Cafago offers the Scishion V88 Mini II 4K WiFi Android TV Box for $42.27. Coupon code "ZV2916MG" drops that to $29. With free shipping, that's the lowest price we could find by $2. It features a RK3229 quad-core processor, 2GB RAM, 8GB internal storage, 4K support, 802.11n wireless, Bluetooth 4.0, HDMI, USB, microSD card slot, and Android 6.0 (Marshmallow).
Note: This item ships from mainland China and may take up to four weeks to arrive.