[hatbert]

You could start by estimating the time cost correctly. You're assuming that the time required to select the right monitor is zero, that the time required to understand the various connection standards is zero, etc., etc., etc. The only cost you're counting is the act of unboxing and plugging it in.

Maybe you and I keep track of this stuff professionally or as a hobby, but most "grandmothers" don't. Quick: What's the best lock-in amplifier for rejecting mains interference. What? You don't know what dynamic reserve means? Jeez, you're such a dummy.

Think about how you would go about buying a piece of technical equipment outside your domain of expertise. That's what a "grandmother" is doing when he/she is buying a monitor.

[jiggy2011]

Not really the same thing, you could walk into any electronics shop and they will sell you a monitor that will work with a mac mini.

[jeroen]

Did you include that in your five minute estimate?

[jiggy2011]

Yes