Received mine today, and can confirm it's genuine.
Paying via Sportdirect UK and using GBP will make the price including shipping for around $250 (Depending on card exchange rate, mine was $248.47).
Good deal for a 3 Layer GTX jacket usually rarely come below $300 for a 3 Layer.
On Marmot Site this is selling for $899 (https://marmotau.com/products/spire-jacket-2)
$899 lol