Thank you very much for your follows and repeat purchases. If you are not satisfied, we offer returns and exchanges within 30 days of receiving the product. We hope you can purchase with peace of mind. Due to the quick sell-out, we are unable to offer discounts. We appreciate your understanding. These balls were opened in early October and used for about a month on a hard court for junior practice. The felt is worn as shown in the images. The air pressure has decreased, but they can still be used for practice. We recommend them for repetitive practice for children who use a lot of balls. We will pack them in a dedicated case. We will respond immediately to immediate purchases. We have about 200 balls in stock. If you purchase a large quantity, we will offer a significant discount, so please contact us before purchasing.