I have had a painting done by a friend of mine and worth $50 maybe taken away at the border because I did not declare it and had no papers on it. A friend of mine had an old camera given to her by an older gentleman as a gift confiscated at the border because she walked through the green channel with it. Art is best declared I think unless you just really don't mind having it taken away or having to bribe someone for letting you take it out. Your call.