A MISB Lego set is the same as any other collectible toy. It's worth much more money unopened. The second you open it, it loses its value. If you think it's silly then don't buy them. You're wasting your money if you buy one and open it because you paid a whole lot more for it being unopened. Though I will say to those who own more than one MISB of a set, why bother hoarding it? Let someone else have it and appreciate it.