I'd read in a particular listing that the shipping prices are set by some eBay algorithm that is all hosed up, and that I should email the lister for the actual shipping cost. I then tried that about a week later with a different seller and they insisted the cost listed is the actual shipping cost.
I did get the sense that the latter seller was fed up with Trump tariffs and so as a Yank it became my personal fault somehow. OF course, no way to prove that. So who knows?