We should never insult a fellow hobbiest purchase choice, by referring to anyone as a "sucker". Some folks are just starting out, uninformed.
That's why this forum exists, to share our knowledge and joy in this hobby.
If someone wants an item NIB, because that is how they want it (new in the box), then what they are willing to pay usually ends up being MSRP and sometimes more if the item was limited or very desirable...their choice.
Consider what prices an original 700E or an original 773 hudson in good condition bring.
Some stuff IS out dated, not popular and produced in volume, ("another one of those").
Some people want the simpler electronics with already encountered problems and fixes.
Newer bells and whistles will eventually have their own issues.
It all boils down to personal preferences: pre war. Post war, modern era. Types of control systems (TMCC, LEGACY, PS1,PS2,PS3).
I personally have a TMCC 4-4-2 E6 Pennsylvania Atlantic...really happy with it...no desire to own a Legacy version.
If or when it dies I'll probably look for a "used" replacement or an NIB (at a "reasonable" price). Someone else with similar sentiments might just prefer an NIB at full original MSRP.
In this hobby all that matters is that it's your railroad, and your choices.
Buy what you can afford, buy what YOU like.
If the prices are unreasonable walk away.
Dont be bullied into "must have" , ........newest is not necessarily best.
Eventually the market place establishes value and price.
( remember beanie babys?)
It's your railroad.