If you are a true enjoyer of the thing - Only one open box item you can play with and enjoy, since you are not a loser poser or shelf collector trying to fill some empty meaningless void with consumerism because you are unhappy and an abject failure in other walks of life. Because you aren't that, right?
If you are wealthy true enjoyer of whatever thing, then one loose you can play with and enjoy, and one NIB you can keep minty or open when the other breaks.
People who collect just to put it on a shelf, or just to amass all of whatever, or never use/enjoy said item, or just want to flex on strangers online, can suck a fat dirty donkey **** in hell. You aint no collector, you are just another jonny-come-lately with money in your pocket who saw the cool kids having fun with what they love and decided to absorb someone else's hobby like some hobby Borg piece of **** driving the prices way up and detracting from the hobby you don't even really give a **** about anyway.
And people who get things graded and slabbed? There is a special level of Hell waiting just for your greedy ass when you die.
Just don't be a poser, and ensure you actually love, use, and enjoy the things you collect.
sorry, I get worked up about all the hobbies wealthy bored posers have pushed me out of over the years