I have shipped ex USA. Main issue is people don't want to ship them.
They have plenty of local buyers, so why bother wrapping it all up and dealing with shipping etc? Pain in the ass.
Also, the USA is a huge country and inland truck freight is expensive.
If you can find one close to a port, freight isn't so bad.
But if the pin is in the middle of the country ... Faaaaagedddaboutit.
rd