100 Calorie Packs Oreo Thin Crisps Snacks, 6 Count Box (bulk pack of 6) @ Amazon, $5.70 with S&S 5%.

Amazon has 6 boxes of Oreo boxes, themselves containing 6 packs of Oreo Thins for $5.70 when you checkout with Subscribe & Save.
They are $6.00 each if you checkout normally (Add-on item, use Alexa to bypass).
Limit 4 boxes per account.
https://www.amazon.com/dp/B06Y4YDWT4