Pascal,

we're selling them here in Europe - after having tried them a while. A
nice unit at a great price, considering what comes with it. If you are
in the US and the price you found is 500 $, you need to look some more,
because you'd be paying more than you need to. Google is your friend.
In fact, if your budget is around 700, you might want to look at the
Airmap 1000.

--
Thomas Borchert (EDDH)