I was looking at even a 1080ti and they’re > 500 euros here in Germany! It’s ridiculous. I mean it’s an amazing GPU but it’s 2 generations old now.

In Austria even 1660s are >400 Euros. Try that for insane.

1080TI was one of nvidia's "mistakes" as it was ahead of its time in performance and VRAM size and was one of the reasons people owning it could afford to skip the overpriced RTX20X0 series and even the RTX30X0 series. That's why they held up in value so well, even before the pandemic shortages.

I could sell my 1060 6GB for roughly same price I've bought it back in 2016.

True. It really is a special card. Good thing is, at least for me, I don’t need a new GPU I’d just like one for higher fidelity in games.