I have several hundred hard drives. I take off the logic board, and I have taken apart some of the casings (love the magnets), but it is a tedious job. If I don't take apart the drive for the innards, the drive is being destroyed by punching 2 holes through the casing. So I don't have a problem keeping it whole and worrying about data theft or access. Should I drop them off whole at the local scrap yard? What is an average of what they pay per pound whole vs separating the alum, ss, and components?