The listing, Tiered YuGiOh - Rares and better! has ended.
Here is how it works, I have tons of these and my kid doesn't want them anymore..
Every 100 credits bid [rounding up] gets 1 non-duplicating Yugioh Rare or Better. If the bid goes beyond the number of non-duplicating ones [I have about 30 non-duplicating ones] I will add 10 common Yugioh for every 100 credits beyond that point, in addition to a duplicating Rare or better one.
I have a ton of these and will keep going until they are gone. Please ask if you have any questions.
I can not guarantee a particular card, but if you request I will try to accommodate as much as I can.