Invalid Invalid post

Hello!
A guy scammed me with some low strange weapons and with a CD-KEY (he said it is acceptable in steam /Serious Sam 2nd encounter/)
So, He said to me If I give 2 hats and a strange knife , he give me a Game in steam /Serious Sam the Second Encounter Classic/ and he give 1-2 stranges (i dont remember because it was last month ) , I gave the stuff, and he gave me His stuff, and the cd-key, I tried to Accept the CD-KEY and that was invalid, He deleted me , and never could get back my items (Oh, and he stolen my friend's Picture while we trade, so I thought he is my best friend)

His Steam ID .: http://steamcommunity.com/id/heeaay/

My Steam ID/profile/ .: http://steamcommunity.com/profiles/76561198025570344/

I hope I can get back my stuff,
See you later,
Bye!
/Sorry for my bad english/

Please follow the appropriate report format here .
Without screenshots, the report is void I'm afraid, if possible, upload a screenshot of your trade history. This can be found by going here and clicking view inventory history, just above advanced filters.

Unfortunately, that link doesn't work nor has it previously- the guy must have changed his ID. Without any screenshots or information, we are unable to process this report.