If you are looking for beautiful and old objects, you should visit the antique market next to Tiergarten. It is a pretty big market with a huge variety of old goodies: plates, furniture, toys, CDs, accessories etc. You can find pretty much everything. My favorite was a gorgeous telephone. It looked like the ones that you normally see in movies that play during the war times. Unfortunately, the battery of my phone died when I wanted to take a picture, so I could not capture it. But I attached an image from Google maps, so you can find it easily :) The address is Str. des 17. Juni 110 – 114, 10589 Berlin.