I do Agree with those that say today's prices are greed,
PURE Greed, in for the kill....but hey,, greed has been around a very looooong time
It made me think of a transaction I made some years ago.
I had bought a box of stuff which included a Leica branded cap with an unusual diameter.
I asked on an online forum what lens the cap may fit, and was told it was a rare cap for a specific lens (don't remember which).
I didn't need it, but needed a regular rear cap for an M lens. I offered the cap on the forum for someone who owned the lens and didn't have the cap, in a one to one exchange for a regular Leica M branded rear cap.
(I could have bought a generic M lens rear cap for less than the postage in this transaction)
The first person who responded (a regular contributor on the forum) that claimed he would be happy with the cap for his lens, got it.
I sent him the cap, and I received a Leica M rear cap with a crack - one of those cracks where it is visibly clear that the crack had been there for years.
I politely pointed out the issue, but he defensively claimed that the cap I sent him was dented in transit so we were even.
Two days later, on the same site, he put up for sale the cap I had sent him, advertised as in "mint" condition at the regular bloated collectors price.
I didn't loose anything, but I certainly felt stupid.
To this day I still don't know what lesson I should learn from this transaction.
I don't think I would still recall this incident with irritation if I had just sold the cap at the bloated price, yet I fundamentally don't want to support greed, as you point out.
But do I want to support other people's greed?