I sit in the middle here. When I open the containers my Apple II's live in, instantly the smell makes me 11 again, so mostly out of nostalgia, I like the thought that somewhere, somehow, one exists as it would have been on the shelf - and as techexpress is suggesting, if you're trading in "original" and are prepared to stand behind "original" then it's perfectly valid to say that you need to own it if you want to open it and you need to understand what you're buying.
For enthusiasts, by all means, buy a cheaper, less pristine one that is unboxed and use that day to day to preserve the condition of your original one... But even 5000 year old artefacts in museums get opened to be examined and shown. They take extraordinary lengths of care, but they do it. Certainly a boxed item can be opened and preserved as new without damage by expert hands. It's ridiculous to turn something into the collectors equivalent of Schrödinger's Cat.
But I'm not a fan of investors who leave these things forever sealed, solely for resale value. They're like those people who have a "never played" 1950's Stratocaster in a bank vault
. They just drive up prices and deny availability to real enthusiasts. They should go buy real-estate.
"dsakey" on trademe. Apple II's are my thing.