it will show up in their scanners, and unless you can convince them it is used, they will be looking to charge you taxes. It helps not been in the original packaging, I used pipe lagging and taped bubble wrap to the screen and put it in my suitcase (27" fitted not so sure about a 30 inch), and although they were telling me how they would inspect the screen for scratch marks and how they could identify if it was used or not, after seeing the packaging they had seen enough.