Took a chance
I found a Revenant Delta 4 mod on eFun.top for what seemed to be a price that was too low. I read the reviews of the site on several rating sites, and was concerned with whether they would fulfill the order or send me a counterfeit device, but I decided to place the order anyway and see what happened, and post my own review of the site either way. I ordered from the US warehouse, and was very surprised when I received a shipped email the next day with a tracking number for USPS. The order arrived 2 days later on a Saturday. I opened the package and it looked to be authentic. Just to be sure, I checked the scratch code on the Revenant site, and it was genuine. I can't say that everyone will get the service I did, but I was very pleased with my experience with them.