Where to buy a second-hand motorcycle - Germany

Hi, all

I wanna buy a motorcycle in Germany and ride around Europe for 3 months.
I'm looking for a cruiser of 200c.c.

I've Honda Phantom TA200 in mind, but I don't know if there is such a model in Germany.
However, I can consider a cruiser of 200c.c. or less.

May I know if there is any 2nd hand motorcycle shop I can approach?
Or, if there is anyone who can sell me a motorbike?

http://www.motoscout24.autoscout24.de/Public/Home.aspx