KeeQii 1080p HDMI Capture Card with 4K donwsampling - $10 (Eugene)

I bought these when I first got into Lives Stream but have since upgraded to PCIe HDMI capture cards (Elgato Camlink Pro).
The KeeQii capture cards can downscale 4K30 to 1080p.
The downside is that there is no HDMI passthrough, but it's good for hooking up a camera to your PC to use as a webcam.
I can sell you a 6-foot Micro HDMI cable for your mirrorless for $5.