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.
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.