-- Last Updated: Feb-04-13 8:35 PM EST --
Ask customs agent to actually type a computer note
into the system to document what you brought in;
- then it can be compared to what you brought home.
Customs "can" be picky as hell, usually they aren't.
I went once on extended trip, very very heavily loaded,
multiple toolboxes, food, etc. and got the n'th degree.
Live and learn.
Carrying a bill-of-sale showing ownership is a good idea.
Any issue of whats-it-worth gets nipped in the butt