Please wait for a invoice to be sent on combined orders as i cannot change after payment has been made.. Combined Postage Cost are $6 for up to 500g in weight $10 for up to 3 kgs in weight $15 for a maxi Box (unlimited amount of items )but you must wait for a new invoice to be sent These prices also include part cost of paypal for your convenice I can weigh your items to let you know how much free space you have left, or would like to know what would fit to a bag, any question just ask thanks Tarnya