Exactly. I was giving an example of what post scarcity looks like.
The "air market" is effectively post scarcity for most people (baring the exceptions that you mentioned).
Other markets will become similar to the "air market" when we get really good at producing those things as well.
I suppose the only reason we don't usually experience air scarcity is because the ecosystem services of earth do a really good job providing it.
It's easy to imagine this not being the case. There is clean air scarcity in polluted cities, and of course in some space environments, air might be considered quite valuable and "hoarded".
Water scarcity and water use rights are totally a thing though.