What if that R.E.M. CD with a cracked case was a cracked smooth sided case? Would it still be a mere part of the "music library" or would it be promoted to having pride of place in "the collection"? And what if it had an obi? But what if the obi was torn? And what if the cracked case was wrapped in mylar?
I only consider an item part of my collection if the members of U2 have etched their names in the deadwax.