I store the cards in a case. Regarding their condition, I've set them to "Slightly scratched or dirty" across the board for used cards to prevent any issues. Please assume there are scratches and purchase them with the understanding that they are for play. I will ship them with waterproof and bend-resistant packaging. I offer a 50 yen discount on the second single card purchased and beyond! Please be aware that the discount cannot be applied if you purchase them separately. Please be sure to consult with me via the question function before purchasing.