Would I know how to trade replica brand heading watches on a website surrounded by the United States?
Answers: You can sell something that looks close to something else as far as I know, but you cannot claim that it is the name brand. If your watches LOOK approaching rolexes but aren't and you admit that they aren't concrete, then you are okay. If you claim that they are definite when they are not, then you are committing a crime.
The answer is conceivably!
You will have to research the see that you are considering.
It is a definite no-no to use the brand baptize (trademark) - eg. Rolex or Omega.
Some manufacturers will also own design features and functional features that are patented. You will have to review these patent to see if they are being violated by the replica and if they are still surrounded by force.
The easy answer to your interrogate is that the dearth of "legal" websites that sell these replicas indicates that it is not endorsed