Why does this need to be a video?
Frugal
Discuss how to save money.
It was made by a youtuber for his subscribers, whom I also happened to be subscribed to, and found it interesting enough to share it.
If you can find someone who made an article along the same lines as the video, you could post it here in the comments for those who prefer not to watch videos :)
Under $40 is a bit of a stretch
I was basing that on what he mentioned at the end, but you're right. Checking ebay, it looks like they go for around $80 buy it now, and around $50 w/ shipping for auctions.
Cheapest one I see is $117 + $30 shipping on eBay, so even that number is going to be regional.
True, PC part prices can vary dramatically depending on the country. The prices I mentioned are for the US region, specifically.
Worth flagging for anyone pricing these out: a used 980 Ti pulls way more power under load than anything from the last few generations at a similar performance tier, so it's worth costing out the electricity over a couple of years, not just the upfront price. If Maxwell-era specifically isn't a requirement, a used GTX 1660 Super or RX 580 8GB tends to land in the same rough secondhand price bracket right now and draws a lot less power for similar 1080p performance. Either way, worth asking the seller for photos/video of the fans spinning up and checking for coil whine before buying - a good chunk of what's floating around this cheap did time in a mining rig at some point.