Have you ever received a counterfeit Samsung phone on Ebay?

I am currently shopping for a Samsung phone and started looking at the Galaxy Note 20 Ultra 5G, I noticed the $322 USD Ebay price for the phones (new, sealed, and unlocked) are the same or cheaper than a refurbished Note 20 Ultra 5G on amazon. The low prices and large number of sellers offering the phones has me questioning the authenticity of the phones.