Opening a new in box item is really a personal thing to me. If one thinks that they will feel guilty by opening the item should certainly not. I am not that into boxes that much but I do have tons that are sealed but I have no qualms in opening them. I have thrown away more boxes than I have. I see these as toys and most of the time I just want to play with them. A lot of collectors have one to play with and another sealed to save. As far as value is concerned I think in this day and age is over blown as you won't get rich selling these in the future, in fact, one will probably take a loss factoring in the cost of living in the future.
Long story short...what makes you happy without reservations will lead you to what is right for you not for others.
Long story short...what makes you happy without reservations will lead you to what is right for you not for others.