How does one find such retired laptops? As an individual hobbyist in the US, would I just monitor eBay, Craigslist, or Facebook?

I was about to ask, wasn’t Mullvad discontinued a few months ago? But I’m thinking of the Mull browser, right?

Update - using Distrobox, I confirmed the Window Capture option is missing from the Sources menu in OBS Studio v31 (Fedora 41):

It is there in OBS Studio v29 (Debian 12):

You might be right. The OBS kb says Game Capture is for Windows users only and that Linux users should use Window Capture. In my version, I have Game Capture, but not Window Capture. I fiddled with Game Capture, but after a few minutes I couldn’t get it to show anything other than a black screen, so I went back to what I use now, Screen Capture (Pipewire).

Good question. I’m not sure I can install the non-flatpak version because I’m on Bazzite. Then again, I reckon I can use Distrobox to skirt around that. I’ll try it and report back.