How much does serum costs?

Excuse me, could you please clarify for me the cost of Serum? I've been hearing a lot about it in the cryptocurrency and finance space, but I'm not quite sure how much one would need to invest in order to acquire it. Is there a fixed price, or does it fluctuate based on market conditions? And if so, how frequently does the price tend to change? Additionally, are there any fees associated with purchasing or trading Serum that I should be aware of? Thank you for your assistance in helping me better understand the financial implications of investing in this particular cryptocurrency.