The value of a 500 Amazon gift card in Nigerian Naira can vary depending on several factors. Exchange rates play a crucial role. At any given time, the exchange rate between the US dollar (as Amazon gift cards are denominated in dollars) and the Nigerian Naira fluctuates.

To determine the exact amount, one would need to check the current exchange rate. Financial institutions, currency exchange platforms, or online financial news sources can provide the most up-to-date rate. For example, if the exchange rate is 1 US dollar = 410 Nigerian Naira, then a 500 Amazon gift card would be worth 500 * 410 = 205,000 Nigerian Naira.
It's important to note that exchange rates are constantly changing due to various economic factors such as inflation, interest rates, and market demand. This means that the value of a 500 Amazon gift card in Naira can change from one day to the next. So, when looking to convert the value, it's essential to use the latest exchange rate available.