When I was in the US, I would never trust a eBay seller from china (2000s) at the time because it could be fake. Especially with shoes. Unfortunately, some create US accounts but ship from china/asia.
The worse was when someone sold me a jordan xi dmp when he gave me size 11 instead of my correct size. Then suddenly disappeared from eBay and this guy was from Canada. I was forced to sell what could be a knockoff but I didn't know. So far the guy I sold it to hasn't complained yet. . Could be legit after all