ANSWER:
If he sells you something that is well described to you while naming a fixed price and giving it to him in advance in full and he gives a fixed date of arrival, this is called salam transaction and it is permissible.
ANSWER:
If he sells you something that is well described to you while naming a fixed price and giving it to him in advance in full and he gives a fixed date of arrival, this is called salam transaction and it is permissible.