Amazon has the Swiffer Sweeper Dry Sweeping Cloth Refills (48 count) for as low as $5.97 with FREE shipping when you choose Subscribe & Save and clip the $2 eCoupon.
This makes them only $.12 per pad (which is $.03 lower than my buy-it-now price).
Two things, because this is subscribe & save, you do not need a $25 order. And in order to get the lowest price, you will need to have the magic five subscribe & save subscriptions. This is lower than Costco pricing (even with the coupon book) and it gets delivered to your door.
Remember, you can get up to 20% off your Subscribe & Save items if you have five orders in one month. Here is a Subscribe & Save Items Under $5.00 List to help you reach that magic five number.
After you receive your order, you can decide to not continue with scheduled deliveries – you can go to your Amazon Account, click on “Manage Subscribe & Save” and cancel your subscriptions.
Pricing was current when the post was published, however Amazon prices change often, so please check before you buy.