What is the legal ruling on dealing with the Syrian pound when purchasing real estate, in light of the severe fluctuations in the exchange rate, and the consequent increase in the amount paid?

There is no legal impediment to dealing with the lira or other recognized currencies in circulation. The fluctuation in its exchange rate does not affect the permissibility of trading with it, whether buying or selling, as long as the price is known and both parties agree to it, in accordance with the Almighty's saying: "O you who have believed, do not consume one another's property unlawfully but only [in lawful] trade by mutual consent," and the Prophet's (PBUH) saying: "Indeed, selling is by mutual consent." The price fluctuation is not considered an injustice, as it is possible to exchange and pay before the change occurs. Furthermore, the price movement might be in the interest of either party, just as the price of the commodity itself might change. The change in the exchange rate affects the value of the currency itself, whether it is a price in a transaction or savings.