The value of a $250 Amazon gift card in Nigerian Naira (NGN) fluctuates daily due to currency exchange rate variations. Currency exchange rates are determined by a variety of factors in the global forex market.

Typically, to find out the exact conversion, one would need to check a reliable financial news platform or a currency exchange website. These sources provide up-to-date exchange rate information.
As of today, without real-time access to the latest rates, it's impossible to give an exact figure. But it's important to note that the conversion rate can change throughout the day, influenced by economic trends, central bank policies, and market sentiment. So, when looking to convert a $250 Amazon gift card to Naira, it's crucial to stay informed about the current exchange rate for an accurate valuation.