Yeah Aussie dollars and its the:
Sigma Zoom AF 24-70mm 1:2.8 f/2.8 EX DG macro Ö82 Made in Japan
S/N 4060455
Comes with padded soft EX series zip case, has the good type of centre pinch cap, and that nice almost felt feel to the plastic shell.
Its screw driven on the Pentax, this lens has been updated the older version had a different type of rubber grip with larger grooves.
I don't mind selling internationally if the buyer has some feedback, however i have no feedback on here so perhaps when i get around to putting it on ebay where i have decent feedback you'll be more interested.
Anyway i have some interest from a local buyer but he is on holidays atm so ill see where he is at an it goes on ebay next week.