Don'tcha just LOVE their little 'handling fee'? They did call it a 'service fee' for a while until it was pointed out that it was no service to the CITIZEN and that they ought to bill the Gummint because it was a service to THEM.
Good thing is that there are no DUTIES on Antiques (anything pre-1898) of any kind coming into this country.
BTW, there is no duty, no tax at all if you just bring in gold coins and minted silver, postage stamps and things like that, no matter what the metal composition. A US Eagle might be worth the best part of a grand, but it still says '10 dollars' on it, so that's all it is! Traffic in coins, bullion, stamps all are governed by multinational treaties because the Banks would scream if they had to pay any taxes.
Poor them!