Reference: Fataawa al-Lajnah ad-Daa.imah lil-Buhooth al-‘Ilmiyyah wal-Iftaa., – Volume 13, Page 48, Question 10 of Fatwa No.6364
Question: Is it permissible to sell music (audio) cassettes, like cassettes of Umm Kulthoom and Fareed al-Atrash and that which is similar to them?
Response: Selling these cassettes is haraam; because of that which they contain of music and songs which is haraam, and listening to it is haraam. And the Prophet (sal-Allaahu ‘alayhi wa sallam) said:
«Indeed if/when Allaah has declared something haraam, then buying and selling it is [also] haraam».
And with Allaah lies all success and may Allaah send prayers and salutations upon our Prophet (sal-Allaahu ‘alayhi wa sallam) and his family and his companions.