I'm not too worried about any "wear" a used card might have. Any used models I should look into buying? Or is it just recent AMD or Nvidia with lots of ram?
I cant recommend the rtx 3090 highly enough. Everything on max settings, including vr games. Some games can even handle 2x render scales. Works great for rendering as well.
It depends on your expected use case. AI? Gaming? Rendering? The priorities change between these different scenarios.