From a private party have them meet you at your local Apple store. If the person selling their watch makes up excuses to that suggestion walk away from the purchase. They have something to hide.
An honest person will meet you in a public place. I think Apple retailer is the best
Also to determine if authentic look on the back of the watch. It will have its iconic Apple logo on it as well as the size of the watch
Example. Mine says 38mm case 7000 series aluminum ion glass composite back
As a seller on eBay I keep my original packaging if I decide to sell an electronic device and will provide proof clean ESN
Protect yourself and your wallet.
There are honest sellers but there are scammers too. Use good judgment. Be safe.
An honest person will meet you in a public place. I think Apple retailer is the best
Also to determine if authentic look on the back of the watch. It will have its iconic Apple logo on it as well as the size of the watch
Example. Mine says 38mm case 7000 series aluminum ion glass composite back
As a seller on eBay I keep my original packaging if I decide to sell an electronic device and will provide proof clean ESN
Protect yourself and your wallet.
There are honest sellers but there are scammers too. Use good judgment. Be safe.