What is the ruling on buying a car in installments and selling it before its ownership is transferred, whether to the seller himself, or to another dealer in the showroom, or to a party outside the showroom while the car is still registered in the name of its original owner?

Purchasing a car in installments and then selling it for immediate cash to the same person from whom it was purchased is impermissible. However, selling it to someone other than the original seller—whether within the same showroom or elsewhere—is permissible according to many scholars, provided that the car is sold after it has been acquired and entered into one's possession and control. Official transfer of ownership is not a condition.