Invalid 76561198015914158 (arty / mix)

Trading with scammers:
|steamID: arty / mix
|steamID32: STEAM_0:0:27824215
|steamID64: http://steamcommunity.com/profiles/76561198015914158
|customURL: http://steamcommunity.com/id/artycool_
|steamrepURL: http://steamrep.com/profiles/76561198015914158

Item in question: http://www.tf2items.com/item/1418606936
Who he traded with: http://steamrep.com/profiles/76561198003222323
His trade history: http://rghost.net/43332910.view

confronted the trader about trading with scammers on his outpost trade. he was dismissive about the ordeal, to myself and others who took notice. He pretty much outed himself in his discussion with the user, "MY MOM." User admitted to trading with a marked scammer with uploaded photo evidence.
http://www.tf2outpost.com/trade/8166750

Hello! Thank you for your report! An SR admin will investigate this in a while!

Also would help if you could provide the chat you said to have.

i didn't add him on steam. any and all conversation is public on outpost. i could copy and paste what was said there, or post screenshots, but i fear that that would be redundant.