Wow this looks dodgy. Why is he getting you to make this thread? I would feel better seeing some of his steam rep first.
Edited :),I do agree with you that it is looks like it (although he just asked me to post it,but i belive you can use a middleman [as he wants])
And he doesnt have steam that worth 100$ so he cant post it himself...
Forgive me, but I have to do this for public fairness,
Before trading with this guy, read here:
I've checked out this guy, who made a "+rep comment" on the seller's profile. After taking a look at his profile, I've discovered several fake users giving this guy fake rep. The reason I know they're all fake is because all the users registered on the same day and don't own any games. I haven't even gone to the second page, so god knows how many fake accounts he's been using to fake his rep.
Clearly there's a scam going on with the Dota guy, but I find it worrying that he's commented on the same guy's profile that I was going to hand money to. So you can count me out forever and I've submitted reports accordingly. Given your reputation here, I suggest you avoid them too.
Add him for details
http://steamcommunity.com/id/asdf1421/
Clicky
Steamrep
Notice
He ISNT going first,you do. or you can use middleman from steamrep.com