https://www.cnet.com/news/steam-link-price-summer-sale-2018/

I can't believe the Steam Link is just $2.50 today. 

Amazon charges $6-$12 for an HDMI cable that'll pipe video from your PC a maximum of 25 feet away. But the Steam Link can do it from the other side of your house -- thanks to the magic of networking. And today, it's even cheaper than a dumb copper cable.