You will see we have now added a 'For Sale / Wanted' section for those wanting to
sell or buy used musical items.

From now on, that is the only place such posts will be allowed. Please read the
rules in the section sticky.

Somehow I don't manage to find it. Can you point me in the right direction?

Make sure you sign it.

Go to the main page in the forum:
index.php

It is the bottom folder.