Dodgy - Audio dealers?

Hi There, has anyone encountered issues or fraudulent behavior from a Hifi audio seller named Soundzentrum?
Website: soundzentrum.com,
email: [email protected] (Peter Wagner) is the contact 
Address on Website: Tauentzienstraße 16, Floor 2 #322, Berlin, 10789, Germany
Phone on Website:  +49 1 577 916-2508

The problem is - The Shop doesn't seem to exist at the address on the Website (I have contacted all surrounding shops and the building they are supposed to be in (Douglas Perfumerie) and no one has heard of them!  The phone number is for a different location in Germany and isn't listed to anyone (when ringing from NZ). 
I contacted HiFi Platform, they said members had reported similar complaints that the shop doesn't exist.
Google maps shows they existed in an earlier location (Reuterdamm 77, 30853 Langenhagen, Germany), apparently closed permanently.   

I just about sent them my life savings to purchase a pre-amp (as you do :-) but decided to do some research first.

Does anyone know if they are scammers?

Thanks