We do combine shipping cost for two or more items purchased at rate: $12.95 for 1st model
and $3 for each additional similar size item to ship inside USA by ground shipping up to any quantity and $19.99 for 1st model and $8 for each additional similar size model up to any quantity to ship by expedited 3-4 days mail. Second day shipping $38.99 and $15 up to 10.Shipping to P.O. Boxes, FPO, APO, AK, HI, PR can only be done by expedited (priority) mail.Shipping for this model outside USA is $35 and $11 for each additional similar size model up to 8 by express mail with tracking number.Shipping for this model to Canada is $22 and $7 for each additional similar size model up to 8 models by airmail.In order to receive combined invoice for multiple purchases, please purchase items and let us know when you are done shopping, so we can send you one combined invoice. We can only combine shipping cost if items paid in one transaction. Dear Valued Customer! We appreciate your business.