Walmart offers the 2nd-Gen Google Chromecast for $19.99. Opt for in-store pickup to dodge the $5.99 shipping charge. That's the lowest price we could find by $5 and the lowest outright price we've seen. (For further comparison, we saw it bundled with a 1-Month Direct TV Now for $25 in July.) It attaches to your HDTV's HDMI port and connects to your wireless network to receive streaming online video, music, websites, and more from your smartphone, tablet, or laptop.