Ruling on taking the value of a commodity and delivering it to the buyer after a period?

Question:
He says: Honorable Shaykh, may Allah grant you success. A man wanted to buy a commodity from a merchant, such as a car for example, and gave the merchant specific specifications. The merchant took part of the money from him and promised to buy it within a day or two. Then he brought him the same commodity, and they agreed to sell it on installments, even though the commodity has the same requested specifications and there is no loss involved. Is this sale permissible?

Answer:
This is a sale of a described commodity in the debt. If he pays the full price in advance on the condition that he brings him the commodity with specific specifications, this is called a sale of a described commodity in the debt. It follows the course of a forward sale (salam), so the sale is valid. It is valid in this form, but on the condition that the value is delivered in the meeting so that it does not become a sale of a debt for a debt. Yes.