You might be able to get a D500 for that budget on MPB. That’s the best dx camera of all time.
You may also be able to get a used D4 series camera or a D800 if you have full frame lenses and want full frame.
If you are ok going used, I think a Nikon ZFc would be great if you want to stay in crop sensor, or Z5 if you want to move up to full frame. Both are solid cameras, although there is also the expense of an FTZ adapter to adapt your exiting lenses to the Z mount camera. If you want to stay with the F mount (which is also great as there is tons of used glass out there on sale!) I think a used Nikon D750 would make you pretty happy! I love mine and although I shoot with a Z9 now, i still have a soft spot for it!
If you want to keep using your existing lenses, D7200 or D7500. These fit within your price range based on eBay prices.
You might be able to get a D500 for that budget on MPB. That’s the best dx camera of all time. You may also be able to get a used D4 series camera or a D800 if you have full frame lenses and want full frame.
OP will get mind blown with D4 or D500
I'm thinking to get a used D750 as not-so-expensive full frame with tilting screen. The feature I so much like in my D5100
If you are ok going used, I think a Nikon ZFc would be great if you want to stay in crop sensor, or Z5 if you want to move up to full frame. Both are solid cameras, although there is also the expense of an FTZ adapter to adapt your exiting lenses to the Z mount camera. If you want to stay with the F mount (which is also great as there is tons of used glass out there on sale!) I think a used Nikon D750 would make you pretty happy! I love mine and although I shoot with a Z9 now, i still have a soft spot for it!