Originally Posted by
rkkwan
Never seen any weighed, and I have not seen any scales at the gate. Just don't act labored, and put the bulk on the floor. You don't want to hurt yourself lifting the heavy bag up anyways. Off-topic, but check if you need to declare with US Customs if the value exceeds $10k.
Yes, any amount $10,000 or greater in currency/monetary instruments must be declared upon departure from the United States, using Form finCEN 105.
Here is the link to the sample form:
http://www.fincen.gov/forms/files/fin105_cmir.pdf
It may also need to be declared upon entry at your point of arrival.
If these are collectors' coins, they could also be subject to an import duty in your destination country.