The duty will be anywhere from 5-20%. It's really a crapshoot as to what it will be, or whether you will be charged at all. Make sure that you declare it, and I'd say that the chances that you'd have to pay anything to be 50/50. In all of the scores of times I've entered with declared merchandise, I've probably paid duty only 10% of the time. Courtesy and respect goes a long way to mitigate the duty!