@mcc@mastodon.social What grade of HDR are you looking for? Plenty of monitors support HDR10 data, which they map down to the peak brightness their backlights can manage (normally 350-500 nit). βRealβ HDR involves enormously more powerful backlights (normally 1200-2000 nit) and often dimming zones, so the backlight can run at full power only in the areas where the image is exceptionally bright.
For mapped HDR, there are plenty of 1080p, 21-25β monitors which support HDR10 plus FreeSync for under $250 or so (KTC H25T7, LG 24GS50F-B.AUSQ, Acer UM.QX1AA.303).
Real HDR mostly starts around 27β, and you should expect to pay more like $600 per monitor.