Purchased a Garmin 660 just a little while ago.
After going over all the pricing that I could find for a new one, it owrked out about the same to buy from an Oz seller rather than buy from the USA then have to pay for all the new maps, up-grades, etc. for Australia and New Zealand. :)
While it was not the cheapest unit around - sometimes you do get only what you pay for. ( example - my $99 Chinese copy of an iphone
)
The biggest plus - if you can call it that - is
IF anything does go wrong with it - then it can be sent back to the Oz seller - fully covered by their warranty with a minimum of fuss and drama.
So far, so good - it works great, nice clear maps and easy to read, also works great with my mobile phone for hands-free while out driving - car and bike.
Except it once when tried to constantly direct me from Armadale back to Fremantle when I had it keyed in for an address in Safety Bay