Combined shipping will work like this.  I will do only 2 cards in a plain white envelope with the 2nd card S/H only being $0.25.  This doesn't apply to cards over $20 (ebay won't allow plain white envelope) and to any thicker cards.   If I don't offer $1 shipping for that card then you can't use $1 shipping for combined shipping

If you buy more than 2 cards, thicker cards or any cards over $20 then I will use a bubble mailer and $4.50 for S/H.  The same will be $0.25 for each additional card after that.   

If you buy 10 or more card auctions/BIN I will only charge $4.50 for S/H and no additional charge per card.   Send me a message if cards are going to end on different days.