We do combine shipping. If you purchase more than one item from us, wait for an invoice with the correct shipping amount before paying. Please note that shipping is based on what we believe the weight of your package will be before it is packed. If shipping comes to more than quoted, we pick up the difference. If it is less, we do not refund the difference. It would be too complicated to go through every order and see what the post office actually charged vs. what we charged. Thank you.