I've been trying to find $300-ish item from Amazon Business to get the $100 off first purchase, and found this.
Business price itself is $355.33 which is cheaper than non-business price. The $100 discount brings it to all time low.
Original Amazon Business First Order Deal
Users who wish to block "Amazon Business" deals can do so by clicking on the Amazon Business tag, then clicking the 3 dot menu, then clicking hide on new deals and/or front page. Ensure that on the home page, the new front page is selected for customisation to show. Video example here and more info here.
POD machines suck tbh