Where can I buy unus sed leo?

Excuse me, could you possibly tell me where I might be able to purchase some unused Leo tokens? I've been hearing a lot about them recently and I'm quite interested in adding them to my crypto portfolio. Could you recommend any reliable exchanges or platforms where I can find and buy these tokens? Additionally, would you mind sharing any tips or advice on how to safely and securely conduct this transaction? I'm still quite new to the cryptocurrency world and would appreciate any guidance you could provide. Thank you in advance for your help.