Marchel Duchamp once exhibited a small glass ampoule as a readymade titled 50 cc of Paris Air. The object is now in the collection of the Philadelphia Museum of Art, which reports that Duchamp “purchased this ‘empty’ ampoule from a pharmacist in Paris as a souvenir,” in 1919 – and adds that the thing was broken in 1949, “thus begging the question: Is the air [in the repaired version] even from Paris anymore?”
Over on Design Observer I found a very interesting post on selling air. Yes, the stuff we breath. I guess if you can sell old rope on e-bay (it has been done), you can sell virtually anything at all.
Just in case you don’t believe me…
If you want some go here.