I'm traveling to South Korea to visit my girlfriend living there (she's a Korean national). I plan to propose to her while I'm there. I have an engagement ring I paid around $4.5k for that I'll be bringing with me on my carry-on bag. The airline I'm taking states that anything over $800 in value needs to be declared and is subject to travel duties. When I look more into this, I'm seeing a lot of conflicting results. "Official" resources almost exclusively state that it's not typical to declare an engagement ring, but these resources seem to be assuming my girlfriend will be traveling to my destination with me, not that she resides in that destination. A lot of forum posts are mixed on the subject - many say don't and just wear it or put it on a chain as a necklace if it's too small, and others say it's almost destined to be confiscated by the destination country without being declared under any circumstances.
Obviously, the plan is that she'll say yes and accept the ring. It will stay on her person in South Korea after that, and I'll return home to the USA a couple weeks after. (Of course, there's always the chance I'm rejected and it stays on my person, possibly complicating the matter?) Does this change the answer? I know that as long as things come back with you then duties don't really apply.