Nah, that's a misunderstanding. The item you get from the box has a 30 days duration. That's the item you can sell to players and on the auction house. You have to use it to get a corresponding holy weapon that has 180 days duration.
ok i understand now
thats a pity
non-permanent things are highly unattractive...
on the one hand 180 days is "long" but on the other hand i plan to play allods a lot longer, so this smiley

describes my feelings about this quite accurate