Want to combine your postage? Just go to the item you wish to purchase and click on Buy it Now, then commit to buy, then go back, and back and select the next item and to the same till you have all your purchases, DO NOT go through checkout, and I will invoice you once you make the purchase. It may be your account settings are not set to request an invoice so this is the way around it, thank you. As a seller I cannot see the contents of your cart, so cannot combine postage from there.