i noticed this on my roguea little while back i used to have a lot of my friends mail me boxes to open then i would mail them back and my friends would tell me why did u mail it back closed u weresuppose to open it i was like wtf i opend it. sure enough i put in a ticket to blizz gms and they said it was intened to be this way i was like ok..... whatever obviousally they didnt think because now all you have to do is if u get a box and u dont like whats in it mail it to an alt so it closes and sell the actual box say its like a lucky dip =P but u know whats in the box and roughly how muchs its worth so just sell it for more i have had a little bit of sucess with the higher end boxes.
ty