What is the fee to buy Uniswap?

I'm quite curious about the cost involved in purchasing Uniswap. Could you please clarify for me what the fee structure is like for this transaction? Is there a fixed fee or does it vary based on certain factors? Also, are there any additional costs or hidden fees that I should be aware of? It would be great if you could provide me with a detailed breakdown of the expenses involved in buying Uniswap. Thank you for your assistance in this matter.