well i guess u also need to look at the price for other Japan sourced cars.
eg. the odyssey is selling around 2,500,000 yen for a medium model without leather but includes other goodies like Sat Nav. given the ex-rate from your calc for FD2 above, it's roughly AUD$25,380 and yet the base car here sells for mid 30k.
if the odyssey example applies for FD2R, i think it's fair to estimate the rrp would be higher than FN2.

