The rate of a 500 USD Xbox Live gift card today can vary depending on several factors. One of the main determinants is the current market demand and supply dynamics. If there is a high demand for such gift cards, perhaps due to a new Xbox game release or an upcoming gaming event, the rate might be more favorable in terms of getting a good deal.

Another aspect to consider is the exchange rate situation. If the currency in which the gift card is denominated is experiencing fluctuations, it can impact the overall value. For instance, if the local currency is strengthening against the currency associated with the gift card, it could potentially mean that you get more value for your money when purchasing the 500 USD card.
Moreover, different retailers or platforms where the gift cards are sold may also have their own pricing strategies. Some might offer discounts or promotions, while others could charge a premium. It's essential to compare prices across various sources to ensure you are getting the best rate for the 500 USD Xbox Live gift card today. This might involve checking online marketplaces, gaming stores, and even considering any loyalty programs or special offers available.