Prepurchase 3item A person bought goods from another, on the understanding that the buyer takes delivery of them after a while. On the due date, the goods are of no monetary value. Has the buyer the right to acquire the very goods or he can claim back the money he paid? I bought a residential flat as a salaf transaction. I paid a part of the price by installments for which I received a receipt. I’m still indebted for the remaining amount of the sale price. The vendors changed their minds and sold the flat to the housing bank. In exchange, I was offered another flat at a higher price. What is the ruling in this matter? I bought some books in Tehran International Book Fair as a salaf transaction so that I would pay half of the total price at once and the second half when I receive the books. The time of delivery was not fixed. Is this sale valid?