Already Banned 76561198091938729 (mark.mark)

Victim
(since it was just an attempt, nobody)
| steamname: Kinnaj7
| steamID32: STEAM_0:1:18522064
| steamID64: http://steamcommunity.com/profiles/76561197997309857
| customURL:
| steamrep: http://steamrep.com/profiles/76561197997309857
Scammer
| steamname: mark.mark
| steamID32: STEAM_0:1:65836500
| steamID64: http://steamcommunity.com/profiles/76561198091938729
| customURL:
| steamrep: http://steamrep.com/profiles/76561198091938729

Screenshot:
http://i.imgur.com/Nr0em3r.png

What happened:
He added me as friend and began to trade with me.
He said he wanted my full trax set + 2 bloodseeker blades and offered me rotten stache for pudge. I agreed and we opened the trade window. I added the trax set and he the rotten stache. And the he wanted me to put another common item to it - a random sword for juggernaut.
while i was looking at my inventory he removed the rotten stache, so he would just be able to trade nothing against my stuff. I noticed this quick switch scam attempt and now i'm here to report him. Of course he instantly removed me from his friendlist, as soon as i said "reported".

I regret that i didnt look for him here before, since he's already listed and marked as a scammer. Nonetheless this attempt should be added to his history.

Thank you for your time anyways.

Same guy scammed me. Just write a ticket here: https://support.steampowered.com/. If you write it good i think you can get your items back.

I didn't even trade them, i noticed it before (luckily). But thank you for the info

Please upload your screenshot using the "Upload a File" button. Also would you happen to have a screenshot of him quick-switching?

No, i don't have a screen of him switching the items. How could i? I would have to record a video just in case a scammer comes? EDIT: also he aborted the trade before removing me as friend, making it impossible to take a screenshot.
Here's the chatlog as attachment.
I want to remind that he didn't succeed with his scam, but i highly doubt this will be his only fraud-attempt in his future. Especially since there are already 2 other entries of the same guy with the same trick. And yes, i want him to be trade-banned (although i don't know if you are able to do so)

http://support.steampowered.com/newticket.php
Report him to Steam Support as well and hopefully they will trade ban his account.

Thanks for your hint. The steam support trade-banned him now.

Thank you for reporting, Pretender will look into this when he can.

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Thank you for your report. The user was previously banned by Steamrep and/or one of our partner communities. Due to this, I am archiving this report for use in any subsequent appeals. In the event of an appeal, your report may be reopened for further review.