Should be easy, since tickets can be returned until 5 Nov there will be drops almost every week until November. Just keep refreshing ticketmaster.de or eventim.de every once in a while.
I'm looking for GA ticket for Berlin 13th November - I attended the cancelled show using a friends ticket he wants to go to the rescheduled show so in fairness I gave him back the ticket and now I'm on the search for one myself!!!!