Just a bit of advise that you have probably already adopted anyway but I always enter into a dialogue with the vendor before I order and suss out their packaging techniques. Some vendors are not interested in discussing this and if that's the case I don't order. In my experience I have found certain types of packaging from certain countries stands a good chance of clearing customs so unless I know it's going to be packaged as per my requirements its not worth ordering. This also gives you a good feel for how receptive the vendor is to responding to comms etc, very slow responses or terse, rude replies are also a turn off. The type of stealth that works is no secret so vendors should not be adverse to discussing options with you, if they can't be bothered then I take my business to one who can.