This is a really good price for Forerunner 955, I've checked on ozbargain, the lowest price ever across the ditch has always been over AU$600.
Funny enough Garmin NZ also listed 945 at the same price.
I've already got 245 which is still enough for my needs and running ability, otherwise I would get one straight away.
This is the old model, the 965 is available now, but it only came out last year. I'm very tempted even though my trusty, 5 year old, 235 is still going strong