It's just over US$20, but the shipping from Australia meant I paid more :-(. With that in mind, I am shipping ONLY TO THE US for a flat fee of $8, to be added to the winning bid. USPS Priority shipping with a tracking number.
Great shape, solved once. I'll combine shipping if you also get one of my other two puzzles currently listed for sale here - contact me before paying in that case.
https://www.mrpuzzle.com.au/fallingwater-burr-puzzle.html