Transferring licence help

Ok heres the plot! I now have cubase 7. I have various versions including 4,5, and 6 stuck on a shelf gathering dust. Is it possible for me to sell or transfer theses versions onto new owners? I see on my E licence that I now have only one serial number and thats for my version 7 but this also works for 4,5 and 6. would the licences that came with the older versions still work?
Any help would be most appreciated

No, because it´s not license**s**, it´s one license that has now been updatet to V 7,. but it´s still only one license. If you had bought full versions instead of updates, you would have several licenses.

That would be an expensive way of saving previous versions!!