Does that site exist on the clearnet? In that case, I'd be very careful. If it's on the darknet, you can check the reputation of the vendor via ratings, reddit and dread. I ususally only buy my drugs from vendors that have a high reputation and a shitload of successful sales. And I always received my drugs so far and if I didn't, it wasn't the fault of the vendor. I always recommend to order domestic, to avoid customs, it reduces the risk of LE interference for you.