Possibly a Cabbage Posted:

That would be nice, or alternatively ET should just make the parts (Some parts?) of Pink Floyd untradeable. It seems like it would be trivial to buy, and a pain in the bum to gather yourself, so this is definitely a file where it would be reasonable to exempt from the auction house (alternatively, just keep everything but the final file out of the auction house.)

Umm… I haven’t seen any indication that there’s a particular piece which is the last to be gotten. People have reported missing several that I have copies of, and I’ve seen reports of people missing pieces that I have multiple copies of.