consistently offers great prices.
when taking into account just the price of the box of diapers, the cost is $0.28 per diaper.
but you can easily do better. they frequently have diapers on sale for $3 off per box and you can always find coupons for diapers in the newspaper too.
when i do this, we knock $7 off the price of the box, bringing our cost per diaper down to $0.24.
another trick is to use credit card rewards. for us, our discover card offers 5% cash back at warehouse clubs a few months during the each year.
we make it a point to stock up during this period.
here is how this looked like 