Here’s the issues with buying and selling.
1st) The seller won’t pay for duty fee and such because it has nothing to do with them.
2nd) to be safe I asked my buyer about insurance or on my post, I would put it like this
“

priced (includes shipping & fees)

Insurance available at buyer’s expense

Payment accepted via PayPal, F&F or G&S(4% on top)”
If the buyer want it to be insured at it worth then by all means pay for the fee and they will pay for duty for that as well.
3rd) in case of the cue get damaged or issues, usually if get damaged like crush or broken, the fee would go to seller. Why? First, the packaging need to be safe. I used cue into tube, then tube into a square or triangular box. Everything are stuffed with bubble wrap and tightly to ensure no movement inside. At the end, seller need to find every way to send the cue to buyer’s hand safely. I saw many seller even have it in PCV tube.
2nd) if the cue got confiscated like ivory or rare wood issues, that’s the buyer issues. If the buyer imports or buying something that they broke the law, then it doesn’t fall into seller problem. The buyer should have done his own research of whether or not that cue able to import into his hand safely. As seller, we sometimes know the law and rules but as such only generalize not specifically to every location.
Does that answer your question??