Punjabber... you made it so confusing by adding that fluff and generalizing it >.<
"scammer adds seller from a fake skype to a convo after he receives the pm"
That's all you needed, haha. So this guy just F5'd Heads' profile I guess until he saw that he was "Private Messaging"
Maybe I'm giving Effigy too much credit... in my world, I'd click his profile during the scam report from the group convo and screenshot that... Effigy took the time to open it from his Skype friends list instead? Who does that... dogf.