Looks like PMC got their bulk order in early and they should be one of the first to ship units in March 2017 with April 1st cited as shipping dates for Amazon in the UK. Good luck!
There is 10% off most stuff at Power Meter City with the coupon / discount / promo code: the5krunner10. HOWEVER It will not work for the Fenix 5 as cashback there will only be 10% store credit instead. Sorry. That will be at list-price everywhere for some time, plus Garmin frown upon discounting in any case while products are under MAP.
UK Buyers note: Fenix 5 are now available for UK pre-orders through Amazon. Excuse the image for now…it will be the standard price that you are charged everywhere 🙁
For other countries please click on the flags (top right) there will be links there to the Fenix 5