I am selling my husband's star wars collection at the moment and have managed to price everything except two stormtrooper figures which I cannot find anywhere so any help would be appreciated. They are both white stormtroopers from 1977 but they have backpacks one has a black pack and the other is white they both have their guns, I have found lots of figures without the backpacks he seems to be sure they came with them and they don't look easy to remove does anyone have any idea?