A well packed healthy cham can arrive quite safely if shipping is carefully planned to avoid extreme weather, weekends or holidays, and if you opt to pick the package up at the shipping office instead of having it delivered to your home address (more time riding around in a truck exposed to heat or cold).
Consider that buying a cham at the typical pet shop has its own risks...a mass-produced cham or wild import that has probably not had great care either at the breeder or while in the store. Chances are a pet store cham was shipped from somewhere anyway.
Even getting a cham at a herp expo can be a problem...not all vendors breed their own stock or know all that much about them. They may "flip" cheap animals from wholesalers just to make a quick buck at the show.