the Pilot Super Sport in 225 40 18 is about US$904 + US$350 shipping + AU$60 bank fees shipped from Tirerack.. but I heard Tirerack cannot sell Michelins to Australia anymore...
locally expect $500 each retail.

Kumho KU36 in 225 40 18 should be around $250 and in 225 45 17 is $210 each.