Welcome Shopper! We would like to draw your attention to the dynamic pricing feature of our shopping cart:
the prices of singles are being calculated dynamically, based on the their popularity. If more then one card is available at a given price, when you click on the Buy button, a drop-down menu appears with a choice to buy up to 4 cards at that price. If you buy the maximum offered, and the given card is still available, you will be able to buy more, but the price might be changed.