100 cards = 1 qty
I will do my absolute best to avoid duplicates. The lower the quantity available of an item the more difficult that will be.
Also note, as an example, if you buy quantity of 6 for a set that has 660 cards there will probably be duplicates.
If there are specific cards you need then let me know, but there are no guarantees that you will get them. I will do my best to accommodate.