The word you're looking for is 'Sperrmüll'. And I agree, it's good fun to hunt for treasures.

My things from when I left home I've had since I was a kid in the 80s, my kitchen table and chairs were given to me by my sister when she bought a new one for their house, my entertainment centre was given to me by a friend when he was moving across the country, and my couch was given to me by a friend a few months ago when he bought a new one.

I really need a new bed and a new chair for the living room (both date back to the 1970s), but otherwise my furniture is in decent shape. I could use a new computer desk as it got a bit damaged in the last move I made, but it's not too bad.