I am going to box up one of the heads, complete with rockers, and valve cover, and get a quote on shipping to Australia. Shipping may not be too bad, and I'll work with you on the price. That way it can be fair to all.
I would rather sell them a little cheaper than market value, and ship them, than see them sold as scrap aluminum.
Like to see them used, rather than turned into new Budwieser cans