Thanks Darkchange, but this was easier than expected. This stupid kid didn't put much effort into his criminal enterprise and now he's fucked.
He's taken his site down, but too little too late.
This was kind of fun.

I filed a police report online the same day I lost my money. Didn't really expect this would lead anyway, but I actually received a phone call yesterday asking me to come to the station and make another statement. Since the guy is obviously German maybe they think it's worthwhile doing something.
I'll keep you posted.

SCAM - I fell for the guy

Lost 0.6 BTC

I can confirm this is a scam.

I was going to sell some dude less than one BTC. For some reason I let myself be talked into creating a coupon on btc-coupon.com...he said it would be faster this way as we wouldn't have to wait for the confirmations when we met.

Anyway, he didn't show up. I went back home, redeemed the coupon I had created and withdrew my BTC - the money never showed up in my wallet.

I obviously checked on blockchain.info whether there was any transaction associated with my receiving address, but there wasn't.

My own fault - I should have know better.