Before heading to a sunny place outside Berlin - report coming soon - I stopped for a couple of minutes at Fehrbelliner flea market. It's an event organized every week-end, from 10-11 o'clock and what you can find there is not always the most important question. Sometimes, you'll find something you ever didn't think about finding. The prices are always good and the people are nice enough to accept some bargains. For me, this was one of the first places I visited in my first month as a resident in Berlin. Even you don't want to buy anything, you still will learn something about the city and its people, only looking at the old toys, books and products put on sale. And you will find plenty of flea markets in the city to pursue your documentation.