As for the real question here: People post PM history all the time. It is not private despite the fact that it says "private messages". If he feels that he needs to post it then he can.
Now for the fact at hand. I assume he wants to post the PM history because in it you say the DVD is in perfect condition. But I assume you are refering to the DVD itself not the holder or label. If you specify that the label is good as well, then we have a problem.
But this is over a $10 DVD that aparently works just fine, but has a torn cover. The cover is not the DVD. The cover was not sold, the DVD was. Unless it was specified "like new condition in box" or the like, what is the problem?
For the most part, things in the FS/FT forum are sold "as is" in "working" condition. If it works, you have no cause for complaint.
Also, for the record, both of you are acting like little children.
masterxfob: Send me the damn DVD. I will buy it for $10. Problem solved. You have PM.