It isn’t about color, it’s about resolution. My LG ultra fine 5k monitor is amazing. Will never go back to cheap monitors again. It pairs perfectly with the 5k iMac Pro.
I can buy two 27-inch 2560x1440 Lenovo monitors for 580-680 euro. So you can definitely get resolution (not necessarily pixel density) for pretty cheap.
What? How about some specifics. My requirements for a monitor is high resolution for plenty of desktop space (minimum 4k) and IPS panels for viewing angle, besides, I think IPS is the least straining panel to look at. When you combine these two requirements you are likely at 700+ for a single monitor.
But hey, I see 80 col Vim developers, too, so everyone’s needs are different.