CeBIT returns to Darling Harbour in 2017 and so there will not be free train travel next year. Registration for the exhibition pass is currently free but I don't know if CeBIT will put a price on it later.
When: 23 to 25 May, 2017
Where: International Convention Centre, Darling Harbour
Included in the exhibition pass: Exhibition entry, Showfloor theatres, CeBIT StartUp Conference, PitchFest Access, and Keynote Plenary Presentations.
got 4 pens this year, not worth it anymore