Great price on the Seiko Arnie SNJ025P, 46% off RRP. Free shipping within Australia. Have kept an eye on this since it came out last year, this is by far the cheapest I've ever seen. Pretty rare for it to dip below the $500 mark, and I'm sure I've never seen it drop below the $470 mark before.
This is the classic black-and-silver colourway. Hodinkee review can be found here. There are also PADI and black-and-gold colourways available but they're obviously not quite as close to the original Arnie. I've never seen those colourways as cheap as $429 either, though I think I've spotted the PADI version as low as $450 once or twice.
Don't forget to use the coupon code "SNJ025P", otherwise the watch will show up as $506.
(PS - ripper service by Starbuy, I placed my order on Friday around noon, got an Australia Post shipping notification at 5pm the same day, expected delivery date is Monday. Though that seems optimistic given the pandemic …)