Note that they usually don't collect duty, anyway.

Two years ago I came in by myslef from India with $1,000 worth of stuff (jewelry and linens are great buys there) and they didn't charge me a dime. Same for our last trip to Scotland, where my husband and I brought in 4 bottles of whiskey- double the limit. In both cases, everything was declared in the paperwork- they just glanced at us and waved us through.