I don't have any way of turning the cassette into MP3s, nor have I bought online distribution licenses for the cover tunes on the CD (online licenses are also prohibitively expensive and have to be renewed every year). Theoretically, I could make files out of my own compositions from the CD, and I might do that, but the potential customer has requested all of my recorded material. If I pay twenty dollars in postage, that puts me in the hole, which I am trying to avoid since I make a meager income as a busker and odd-jobs person.