The price seems a bit too high to me, as I've been searching for a normal RB lens (I've only got a 180mm right now). KEH has the K/L 127mm for $140-$200, depending on condition. Then again, that's USD. I don't know the conversion rate, and with what I recall you mentioning about international shipping to/from Australia, it may be a better deal at this price than getting one shipped in from the US.
And to anyone considering buying this, I'd highly recommend it. The 127mm is probably my favorite of the RB lenses I've owned.