I would a feature to be able to shut down my own post.
When a trade is complete, or the topic should be closed.
There should be a button to close down and/or delete your post.
Moderators are able to do this, I would like a feature similar to moderators for my own posts.

It's not going to get added
and you don't need this, you can just stop posting in it and let it fall into the archives

This will never happen.

Moderation powers are for moderators. Simple as that.

As I mentioned in your previous suggestion, please read to sticky so you can properly format your site suggestions.
http://forums.d2jsp.org/topic.php?t=57896631&f=258

It won't happen sir.

It has been suggested many times before and always denied.

http://forums.d2jsp.org/topic.php?t=59469826&f=39&p=
http://forums.d2jsp.org/topic.php?t=72928924&f=258
http://forums.d2jsp.org/topic.php?t=44941261&f=39

And this one specifically on posts #7 and #8:
http://forums.d2jsp.org/topic.php?t=792281&f=258&p=