Many sites have a minimum shipping and handling fee that is charged no matter how much you buy, so if you buy more the percentage that is shipping as opposed to handling diminishes. Either that or they may have a 'small order' fee that is added unless you have a $50 or $20 or whatever amount order. This may or may not actually be stated on the site, but if you look at the shipping fee schedule you can figure out where the price breaks are, whether it is weight or $amount of purchase.