Yesterday I decided to buy myself a new lens. It is the Nikon AF Nikkor 70-210 1:4-5.6. It was a used lens so it did not cost much. I hope at least that I did not pay too much for it. As far as I know such lenses do cost around 300Eur so 170Eur should be a fine price.
If you have other information or tips, tell me. I still have two weeks to give it back, if I am not happy with it.
You can see the lens here.