3090s are no longer produced, that's why new ones are so expensive. At least here, used 3090s are around €650, and a RTX 5070 is around €625.

It's definitely not extremely high end any more, the price is(at least here) the same as the new mid range consumer cards.

I guess the price can vary by location, but €1800 for a 3090 is crazy, that's more than the new price in 2020.

A year ago, I bought a brand-new EVGA hybrid-cooled 3090 Ti for 700 euros. I'm still astonished at how good of a decision it was, especially considering the scarcity of 24GB cards available for a similar price. For pure gaming, many cards perform better, but they mostly come with 12 to 16GB of VRAM.