If you're up for a project, you can swap the guts of those 5K iMacs for an aftermarket controller board which turns it into a regular monitor. It's a bit janky

If you're up for a project, you can swap the guts of those 5K iMacs for an aftermarket controller board which turns it into a regular monitor. It's a bit janky but a hell of a lot cheaper than buying a new 5K monitor.