Q 2:
If a person buys a certain commodity such as a car and uses it for a period of time, then intends to sell it, can he sell it to its original owner?
A:
If a person pays the whole value of the car to the seller, he is permitted to sell it again to the person who sold it to him provided that there is no previous agreement to do that.
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.