There are some books and tapes sent by Muslim brothers and charitable societies which are not meant to be Waqf (endowment). The cover of these books and tapes does not contain the following statement: "It is a Waqf for the sake of Allah" or "it is assigned for giving as a gift and not for sale. The price is written on them. Is it permissible to sell them in case of need? Is it permissible to sell them in order to buy other books and tapes?
Book and tapes which are distributed for free by donators and charitable institutions are considered Waqf which can not be sold or traded in. If a person has them but does not need them, he may give them to someone who does. (Part No. 16; Page No. 25) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.