...but it was the factor google wich has make change mind as he said it was enginered by google i said this is the best thing i can have in the world...
Google is well known for using commodity hardware. They don't use specialized stuff much. Moreover if Google did but stuff from them, even a simple component, there is no way this guy would be telling it to you -- even if the said component was a simple screw and he was really drunk... In fact, especially since this is "designed by Google", this guy wouldn't event know he was selling to Google. It would be routed thru a proxy. AFAIK Google builds their own systems in-house, and are very secretive about their hardware specs and numbers (and locations).
Hope you get your money back... or at-least teach the guy a lesson...
I work(ed) for Google and probably the only thing they buy in hardware wise is the laptops and desktops. Everything else is custom built, outsourced to very specific top range secrecy manufacturers, reassembled in the US.
NOTHING they would buy would be in this form, as a one off. Its a scam.