This is really interesting... let us know how it goes! "Sir, what did you buy for $4000?" "A bottle of heaven."

Unfortunately, my assumption would be in line with Brendan's... you'd be stuck paying taxes and duties since you'd be exceeding your exemption. And I think you'd have to pay it on the whole $4000. I remember the only time I was past my exemption was returning from my honeymoon and the agent in secondary was trying to "separate" my purchases into "we'll pass these under your exemption" and "we'll charge you for these" piles because you couldn't "half-exempt" an item.