I'm using 2x Dell U3011s, one I purchased around ~2013 probably and the other I got used recently for $100. My only issue with them is that they have PWM coil whine that only goes away if I crank the brightness to ~90%, which seems to produce an immense amount of heat and probably power consumption. I'd love to find a viable alternative solution for this, because these are my favorite monitors for now.

The model appears to have been released 16 years ago.

I haven't yet found a monitor that makes sense to replace them with either.