"explosives" would be bad too.
I can see where the taxes are a real pain but it is illegal to falsify customs forms so I would not expect too many businesses will be willing to lie on the value claim.
I do get a chuckle out of the requests that say "I wanted to buy from you because you are so trustworthy, and oh, by the way, would you mind marking my $200 purchase as a $20 gift?" <g>
Tony