LightInTheBox offers the Xiaomi Mi Box Android TV Streaming Media Player for $59.99. Coupon code "MIBOX" cuts that to $56.49. With free shipping, that's the lowest price we could find by $3, although we saw it bundled with more than $55 worth in freebies for $69 in October. It's powered by Google Cast (with access to Netflix, Hulu Plus, YouTube, more) and features 4K support and a remote control.
Note: Uncheck "Add Shipping Insurance to your order" during checkout to remove the 99-cent fee; additionally, you may need to select the free shipping option.