Monitors hold their usefulness far longer than the computers attached to them, which is why used monitor prices in Karachi stay reasonable and second hand units under 10000 are easy to find. For general work any decent LED panel does the job, but for gaming the refresh rate matters more than the size, so check whether it is 60Hz or higher. Look at the screen with a plain white and plain black image before buying to spot dead pixels and backlight patches. Pair with Gaming PCs or Desktops.