heads up. Proshop futaba has the new r4 listed at about $500 australian. Considering the conversion rate from Yen to Aus$ is low this is a good price. Not sure what is going on with US pricing but the price for this kit in Japan seems fair at the $500 range. With a better exchange rate the R4 would be about $500 australian landed.
the australian dollar is currently on parity with the US dollar so read the above figures as US figures if you wish.