Sure, you can go buy a Nexus Player for $50-100 if you want to experience Android TV, but if you need a new set anyway, Sony has a few nice 4K TVs with Google's software already included. They're usually rather expensive models, but one of them is on sale via eBay Daily Deals right now for $850.
The Sony XBR-55X810C is a 55-inch LCD TV that usually sells for $1200-1400 on sites like Amazon and Crutchfield. This is a 4K (UHD) TV, so you'll be able to watch what limited 4K content there is on it. Connectors include a component out, two composites, digital audio, ethernet, and four HDMI ports. The HDMIs also support HDCP 2.2, which is required for some 4K video content. There's also WiFi 802.11 a/b/g/n/ac.
This is a new product, not a refurb or open box. Even if you don't need Android TV, this is a solid deal on a good 4K TV. This deal includes free shipping, but it's US only. Tax is only paid in New Jersey. Note, you need to log into eBay before it'll show you the price, but we've confirmed.