Groupon offers the factory-refurbished Google Chromecast Streaming Media Player, model no. H2G2-42, for $18. Apply coupon code "VISA5" and checkout via Visa Checkout to drop the price to $17.10. With $3.99 for shipping, that's tied with our expired mention from three days ago and $7 less for a new one now. 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. A 90-day Google warranty applies. Deal ends September 13.