How much is one aureus worth?

I'm curious to know, how much value does a single aureus hold in today's financial landscape? It's fascinating to delve into the history of currencies and understand the worth of ancient coins like the aureus. I'm eager to hear your expert opinion on this matter, as I'm sure it's a complex topic with various factors influencing its valuation. Could you please elaborate on the factors that contribute to the worth of a single aureus and give me a rough estimate of its current value?