Cafago offers the TX3 Pro 4K 8GB Smart Android TV Box for $38.90. Coupon code "ZV2429MG" cuts that to $28.87. With free shipping, that's the lowest price we could find by $6. It features an Amlogic S905X 2GHz quad-core processor, 1GB RAM, 8GB flash storage, 4K UHD and 3D support, 802.11n wireless, HDMI, USB, microSD card slot, remote control, and Android 6.0 OS (Marshmallow).

Note: This item ships from China and may take two to five weeks to arrive.