In the UK during the lockdown I suddenly needed to kit out my wife and four children for working from home and there was a shortage of cheap screens online so I bought screens without stands on eBay. These seem to be taken from office closures or equipment refresh and so they are higher end devices with more robust design and more connectivity options than cheap consumer ones. You can buy monitor arms cheaply now that clamp to your desk and provide a much wider range of positions to get an ergonomic clutter free setup. Cost was roughly £30-60 per 19-24" 1080 Dell or HP screen with HDMI/DP, £20 for a good arm and £10 for box containing enough M4 screws of different lengths to last a lifetime. Now that the kids are back in school and more offices are hitting the end of their leases I expect the eBay prices will drop
I'm typing this on a Compaq laptop I rescued from a skip (running Debian), a keyboard I paid 50 NOK for at a jumble sale, connected to a 20 inch Dell LCD VGA monitor bought at Fretex, the Norwegian Salvation army chain of second hand shops. I think I paid about 150 NOK for the monitor about five years ago, that was about 20 USD then.
