Ok so I just started shooting sports and I got to practice at my little cousin's basketball tournament. The parents were notified I would be there and that they could purchase the photos online later. I sold 2 different sets of prints right now. Today I got an e-mail from a parent asking if I only sold the prints or if I would send the digital files via e-mail. I understand that most people do not sell prints and I don't want to either, what would be the best way to tell him this politely and give him solid reasons as to why I don't. Thanks.