What is the ruling on buying and selling non-operational cars from a showroom—with customs papers—which are returned to the shop after being sold to another person?

The aforementioned sale is permissible if the questioner sells the car after taking possession of it, because selling something before taking possession is not allowed. Most scholars are of the opinion that possession of movable goods is not complete until they are moved from their place, while some have held that mere clearance (giving access) is sufficient. What seems most correct is that the sold item must be moved for possession to be realized, and after it is moved, its sale becomes permissible.