i am in Akihabara 2 times a year, they sell way below tamiya prices
Current prices for new tamiya cars:
trf419 for 45300 JPY (365 euro with 10% tax)
ff-04 for 32900 JPY (265 euro with 10% tax)
shops in akihabara are all around these same prices, only the official Tamiya store in Shimbashi is more expensive, but i would suggest a visit just to check their large collection of (build) cars and models.
since the devaluation of the JPY with the new prime minister in summer 2013, japan is the cheapest place to get japanese RC cars.
taxes are very simple, sale tax (VAT) is 10%
you can check prices of the biggest akihabara store RC CHAMP here:
http://www.rc-champ.co.jp/Champ_Web_...ar/6821930.pdf
just add the 10% and pay cash in the store they don't like plastic
you will, often find package deals and extra promos in the store.
last time out i got a ta06R with titanium screw set for 26000 JPY (+-190 euro)
and an mt-4 with RX471 for 18000 JPY (+-130 euro)
however if you don't read oir speak Japanese it can be more difficult.