Preorders of the Amazon Exclusive The Black Series 6-Inch Credit Collection Imperial Death Trooper have started to arrive. Just received mine today. I preordered 2 and they actually arrived mint. They were packed in a oversized box with air pillows. Above is a quick picture of the figure card.
As for preorders of their Exclusive The Black Series 6-Inch Credit Collection The Mandalorian figure, my preorder still shows a estimated arrive date of 12/3, but some people have received them already.