Karl,
Actually, there's every reason to believe that if you have space from prior to the adoption of RFC2008 and 2050 you indeed do have something which is (1) property, and (2) valuable if someone is willing to pay you for it.
As has been demonstrated repeatedly on this list and elsewhere, there are people who place not-insignificant value on addresses. The pragmatic among us would probably argue that even after 2008/2050 or any other pronouncement by any involved party, address space has value and in fact has had and will have value as long as it provides an opportunity for a service that has value. Arguments to the contrary are approximately equivalent to arguing the tide should not come in 'cause it messes up our nice sand castles. Regards, -drc