And nobody ever lied on those Chinese envelopes with the value declaration. ;)

Also, I can tell you that the country of origin field has one of the lowest entry qualities of all fields. People just don't bother, and customs don't have the capacity. Also, depending on your warehousing, there is a good chance you simply don't know. If something in your item bucket came from either China, Vietnam, Malaysia or the Philippines, what are you gonna write?