Purchasing an S24 but not sure if it's fake

Hey all, I buy things on marketplace from time to time and decided to give it a shot buying a phone since my current phones screen is shot.

Found 2 good options but stumbled down the YouTube rabbit hole of potential fakes out there.

If I run an IMEI check to see if it's legit what would it reveal? I see both phones are wrapped in plastic wrap on the box, one of them looks like the strip might have been tampered with. Any advice?