How much is one arbitrum?

Excuse me, could you please clarify for me the value of one Arbitrum token? I understand that cryptocurrencies can be quite volatile in terms of their pricing, so I'm wondering if there's a specific way to determine the current market value of Arbitrum, or if it fluctuates depending on various factors such as supply and demand, as well as broader market trends. Additionally, is there a reliable source where I can keep track of the latest Arbitrum prices and stay informed about any potential changes? Thank you for your time.