“…The problem will be how to determine that there has actually been a transfer of ownership of a copy from the right holder to a user and, in particular, that a sale has taken place. 121 Recital 28 of the InfoSoc Directive would seem to confirm such approach when, after pointing out that "copyright protection [. 124 Now, it bears recalling here the CJEU's view that the applicability of the principle of exhaustion must be considered on a broad interpretation of the term sale 119 See § 2 above.…”