VV does nothing to the clothes aside from remove them from the bag, hang them, and price them. What you're describing is a "closet smell" from clothing being in a confined area like a closet or a bag or a box without much ventilation, a sort of stale fabric smell. There isn't anything that can be done about this other than laundering the item (you should really be washing all of your second-hand purchases before wearing them anyway). You may also be smelling on occasion mold or mildew on clothing that might have slipped by the noses of workers.
Edited by petrichor, 2019-08-04 20:28:52