What is the ruling on selling cars in installments at a known price and for a known term, without transferring ownership of the vehicle registration to the name of either the seller or the buyer, while the seller is aware of the buyer's intention to sell the car later?

Buying and selling a vehicle is valid if the remaining conditions of sale are met, as moving the car to its designated place constitutes a valid possession of it. Not transferring the car's registration (istimara) to his name before selling it does not affect the validity of the contract, because it is a recommended documentation, not a condition. It is permissible to sell cars bought in this manner for cash or by installments for more than their cash price. And it is permissible for the one who bought the car from him to sell it for cash or on credit.