gezepi
This isn’t a full answer to your question, but as for where secondhand keyboards are bought/sold, I bought one from eBay a while back.
At least it’s something that could be added, as opposed to something that needs removing or changing. Of course, that doesn’t matter if there’s no desire or money to change it.
It doesn’t lead to a destination, and maybe isn’t even a riddle, but a sentence I like is:
Is your answer to this question the same as if I had asked you to give me a dollar?
One Pi Zero 2W runs NodeRed to control a few lights in the house. Another used to run Octoprint until it recently stopped responding. I haven’t gotten around to troubleshooting it yet.
Is that an airplane seat in a house?
It took me about two weeks to get fully comfortable going from a normal keyboard to a Keyboardio. It was a long two weeks but I’m really glad I did it. And so are my fingers.
Apparently the companies will adjust the ratio depending on how it is shipped and various other factors.