Looks like a pretty good price for the 5X. Cheaper still are deals for regular 5 and 5S and 735XT.
Amazon US stock.
Garmin Fenix 5 in slate/grey ($390.43 + $10.05 Delivery ) https://www.amazon.com.au/Garmin-Fenix-Slate-Watch-Smartwatc…
Garmin Fenix 5S black ($390.43 + $9.96 Delivery ) https://www.amazon.com.au/Garmin-010-01685-02-Fenix-Watch-Sa…
Deal of the Day link https://www.amazon.com.au/deal/f1eca85e/ref=gbps_tit_s-7_a9d…
If it is actually shipped and sold by Amazon. Pay $6.99 for a month of prime and get free shipping. Can cancel straight away and keep the benefits for the month