Oreo Chocolate Sandwich Cookies – 72 Snack Packs (144 Cookies Total) for as low as $7.47 with Subscribe and Save @ Amazon

I’m not sure if this is a listing/pricing err0r, but Amazon has Oreo Chocolate Sandwich Cookies – 72 Snack Packs (144 Cookies Total) on sale for as low as $7.47 when you checkout with Subscribe & Save (with 15%). Ships free.
The reason I wonder if this is an err0r is because Walmart price for a single 18 snack packs is $4.54 . This deal comes with 4 of this, so the price seems too good to be a regular sale.