I got this https://www.samsung.com/uk/monitors/high-resolution/viewfini... and am pretty happy with it. I got it fairly cheap with a student voucher (I think ~650 GBP).

It had some coil whine initially but that has gone. There's a load of nonsense software in it but I just have it disconnected from the internet and only use it as a monitor. The web cam is not useful but I don't use that either.

This was a couple of years ago - I think that there are a lot more options available now?