You can purchase the Sims University expansion pack directly from the Apple store in Germany. Of course you would need a credit card that was valid in Germany and had a German billing address.
www.apple.com and if that does not take you to the German store, there is an option at the bottom of the screen to go to any Apple on-line store in the world.
I'm visiting my sister in Berlin Germany. My niece has sims 2 mac version. My wife and I would like to buy the university expansion pack for her. We were wondering where in Berlin Germany we could find it. My sister just moved to Berlin and had bought sims 2 for her daughter on line. My sister isn't familiar with stores in Berlin. Thanks.