Well - I just find it interesting... books can be copied, music can be copied, movies can be copied without loosing "meaning" for the owner/receiver... however once it something which we are going to keep in a place we call a "museum", then it has be an original? I usual go to a museum to experience - not to be baffaled about the price tag on things (If I want that feeling I can just order a beer at a "trendy café", and wait for the price ;-))... and they can make good replicas today, which only experts can tell apart from the originals.
Now, since the scream is so famous, then they will probably not try and sell it on the black market - they will probably keep it for ransom