Similar experience with an item at another company's upcoming auction. Item is new in box, never unwrapped. However, that item has a history of paint problems. I emailed the auction house to ask if that lot has the problems common to that item. They replied that "we're not unwrapping it". Depending on whether or not the paint issue exists, there could be a value difference of $300 or more. I'm going to bid under the assumption that the problem exists, but I'm betting that someone else will bet as if the item is known to be perfect. It's frustrating. That's why I like to buy in person, with no buyer's premium or shipping hassles.
In person doesn't always eliminate that problem.
I've seen many seller at a meet declare "It's brand new, it's mint!". Which really means it's unknown.
The people sitting on things hoping to sell them don't want to take the risk on an inspection if they don't have to, because then they take the loss on price if it's in a degraded condition. They are better off not knowing and still being able to claim "mint". The buyer of course doesn't want to buy not knowing the condition.
Problem is there are enough people out there who will still accept the "It's not unwrapped, it must be mint!" mantra that sellers can hold out until one comes along.
Not all sellers mind you. I'm just pointing out it's not necessarily always better.
Some sellers may be willing to open something for inspection if they sense you are an actual interested buyer (and not just a tire kicker - "oh, yeah that's a really nice piece... thanks..." and then just walk away after opening it without buying it, even if it's in perfect shape)
-Dave