[a fool in paradise]

In my experience looking at bookfinder.com there is always someone asking $249 or more for some book (on up to $999).

And sometimes based on the high price listing for some random book from the 70s 80s 90s or more recent, they ALL start asking $129 for it.

But if you consider amazon resale, you can list everything in your library/shelf and if it manages to sell at some inflated price you can almost certainly replace it for less if not immediately at some point if even necessary

[bravo whiskey]

That happens with model kits too. Someone told me there is an algorithm that will inadvertently jack the price up.