Are you talking about the user Paypalmycash, who is trying to buy BTC at a 15% loss in this thread:
https://bitcointalk.org/index.php?topic=995248.0
https://bitcointalk.org/index.php?topic=995248.0
I do not try to scam someone but I see someone is very successful on that
https://bitcointalk.org/index.php?topic=1011337.0