Buying a car from the person to whom it was sold for less than the original price

Question:
He says: Honorable Shaykh, I testify to Allah the Exalted regarding my love for you. I sold a car to a friend of mine, and after a while, my friend offered it for sale, so I came and bought it from him for an amount less than the price I had sold it for. What is the ruling on that?

Answer:
This is not permissible. You sell it for a deferred price and then buy it back from him for less than that deferred price. If this is intended and agreed upon in advance, it becomes a buy-back sale ('inah), which is one of the types of riba (usury or interest) transactions. So do not buy it.
Do not buy it. You have a debt against him for the price of the car, which is less than what you sold it to him for, unless the car has changed. If the car has changed, or if it has been affected by long use and its condition has deteriorated, then the decrease in price is due to the change in the car, and there is no harm in that. However, if the car remains in its original condition and nothing has changed in it, do not buy it from him for less than what you sold it to him for. Yes.