You can use the calculator on USPS
It will let you know. I normally email them and let them know that I only ship inside the US. But they can pay the shipping price. You could invoice it separately?
Mine have actually contacted me before purchase… and then I changed the listing to have the right shipping…
Before Christmas I shipped one to Bermuda. I didn’t charge them extra out of the kindness of my heart during the Christmas season though.
(I use larger boxes so my shipping is always higher than most peoples but, my large box to Bermuda was actually cheaper than the estimate of the Flat Rate box… lol)