Save $$ on combined shipping for additional items you buy from Glen's Vacuum and Shampooer Supply. The combined shipping price is calculated by taking the largest shipping amount, and adding half of the shipping cost of the additional item purchased. If you are buying more than 2 items, beginning with your third item, each additional item adds only $1.00 to shipping. For orders of more than one item, just request an invoice with combined shipping after you have clicked the buy it now button for all of your items. Thank you for your business! Glen