"Was playing unranked doubles with a friend, then this guy: https://steamhost.cn/steamcommunity_com/profiles/76561198343348799/ said he knew how to duplicate, he added me then we had this chat.
-When I said "Lmao nice try scammer" I just faked accepting trading my Parallax.

For anyone searching for his profile https://steamhost.cn/steamcommunity_com/profiles/76561198343348799/"