You mean ability card? Anyway, I think a fair price would be 7 or 8 dollars, because booster packs (1 Bakugan, 1 gate card, and 1 ability card) are worth $5, and Bakuneon are somewhat rare and HSP cards are hard to come by in some states, so 7 or 8$ sounds like a good starting price. If you start too high, nobody will bid on it, and if you start too low, you won't get as much money. By the way, what cards are they and how many Gs? I may buy it from you, because I don't have any Percivals.