Do yourself a favor and go to bbcexchange.com The are the leading authentication and seller of unopened cards in the nation. Look at their list of buying and selling for unopened boxes and cases and if they are listed with a price then you might be on to something. If it is something they consider junk then you are wasting you time and will end up taking most of the stuff to the landfill. They have an eye opening website and if you have questions about a specific box or case they will usually answer it.
Good luck!
Good luck!