Should I buy a used monitor?

Question

Monitors

Is it worth buying a used monitor with an iPS matrix, or is it better to take a new one with a 2-3 year warranty but only enough money for TN?
And in pursuit, another question is how comfortable it is to work with 2 monitors of different sizes? I now have 19", if I put 22" on it, will it be convenient to work and will such an ensemble look miserable?

Answer 1

used without warranty is a lottery