Combined shipping is available.  For orders sent in an ESE, each additional item is 25 cents, maximum of 3 single cards per envelope, more than 4 single cards requires Ground Advantage.   For items requiring Ground Advantage, each additional single card is 25 cents, each additional small set is $1.00.  Larger sets, please ask.   If wanting combined shipping, please wait for an invoice before paying, if that option is not available, I will refund the difference.