What are the conditions of salam? And is it immediate or deferred?

What if the description in the salam is not precise?
No, they must agree on a precise basis; otherwise, the sale is not valid. They must part ways having agreed on something known.
Q: What are the conditions of salam?
A: As mentioned before: it must be for something known. The other conditions are in their proper place, but if one advances payment for something known to a known term, there is no harm. This is a debt for something that is generally available.
Q: Some jurists say that real estate is not included in salam because its description cannot be precisely defined. Is this sound?
A: Real estate is not called "salam"; it is called the sale of specific items. If he has a specific piece of real estate that is known and identified, it is a sale of specific items, not a salam sale.
Q: If this commodity is sold for one thousand riyals, but he refuses to sell it to me for less than two thousand?
A: Or three thousand, that does not contradict the ruling, or four thousand. If you agree on a known term, there is no harm.
Q: Is it permissible for salam to be immediate?
A: It is not salam unless it is deferred; it cannot be immediate. It is not called salam unless it is deferred.