Amazon has Huggies Snug & Dry Diapers, Size 4, Giant Pack, 140 Count for $25.40 when you select Subscribe and Save (with Amazon Mom) and clip the $2 coupon right on the page! This works out to about $5.08 per jumbo pack of diapers. Shipping is free with the Subscribe and Save Option. You can get other sizes. I just tested out the price with size 4.
You are under no obligation with Subscribe and Save. You can go into your Amazon account and cancel this at any time!
You can still get Huggies Wipes for $1.37 per pack.