VIZIO's 55-inch 4K TV is currently on sale over at eBay for just $529. This is a great price for a 55-inch 4K TV in the first place, but this model from VIZIO is a bit more interesting as it is part of its Smartcast lineup.
This VIZIO Smartcast TV has Google Cast (formerly Chromecast) built right in. This allows you to go ahead and cast your favorite content from your smartphone to the TV without needing to buy a Chromecast and using up one of the precious HDMI ports on your TV. Speaking of HDMI inputs, there are four of them. There is also two USB-A ports, a composite port, and an ethernet port. It should be no surprise that all four HDMI ports do support 4K, seeing as this is a 4K TV, that's not really a surprise. This VIZIO TV does come with a rather interesting remote. Instead of a boring remote, it comes with an actual 7-inch Android tablet, that you can actually install apps on and cast from instead of using your smartphone.
eBay offers up free standard shipping on this VIZIO Smartcast TV, and there are also no taxes being collected here. This is a manufacturer refurbished VIZIO TV, however, and it does come with a warranty, so if anything should go wrong, you can get it taken care of pretty easily.