That really sucks dude... I'm sorry that you fell victim to some asshole.
Honestly, I don't understand how somebody can be such a fucking dick that they decide to drop all your untradeables... I mean hacking is one thing, because the hacker is personally profiting off all the items they take from you. But unless you guys are mortal enemies or something, dropping your hard earned items, like your chaotic maul in your case, is just fucking slimy and low. I hope that kid gets banned and gets what he deserves.
If you have evidence of your transaction with this guy, please go to the Report A Scammer section, briefly read the stickies that outline how to submit a proper scam report, and then post there so that a Mod can handle it and get his ass banned. We don't need kids like that around Sythe.
EDIT: It actually is against the rules to accuse somebody of scamming unless you have proof, so you should remove the kids name so that your post just says "you got scammed". Hopefully Stui doesn't report you, but he doesn't seem to have much sympathy for you. >_<