As a mod here, we have seen this sort of thing in the past. New member joins up, asks a random question and then disappears. Next thing you know, that member is out trying to scam someone.
Your post contained absolutely zero helpful information in it at all. If you had taken the time to explain why you were looking for the set in the first place, no one would have cried foul. You really shouldn't be all that surprised by the responses to be honest.
Add to that your thread title with ***Urgent*** in it and it just screams scam. Nothing happens "Urgently" in the rep world and when someone needs something that quickly it usually also smells of scam.
Sorry for your bad experience with this thread, but I am not at all surprised by the members responses to it.