Buying diapers from Costco is still not buying in bulk. How low can it really go? I live on campus with many other families, so the density is there. I found Discount Warehouse (800.946.8736), an inventory closeout site which sells by the truckload (40' trailer). They claim on their site as low as $2.25 per package - but of course, you'll have shipping costs, and, unless the whole village comes to buy the diapers, storage costs. I called them this afternoon and found that none are available at the moment. Liquidation.com might be another place to look.