its not often a model is advertise with a nice rounded number tag due to the inclusion of tax. Unless ofcuz the base price + tax = a nice rounded number, however this does not happen very often since the range of number in order for this to appear is quite limited.

we know the tax is 5%, now if the tag says 4500 it means 0.05(base price) + base price = 4500. Do some calculation n u will get base price = 4285.714286. For marketing purposes, Bandai will never put such number on the box as it is difficult to calculate, messy and hard to remember.

if u saw 4500 on the tag, its either
a) an error and tey hav corrected it
b) u remember wrongly as i hav never saw any pic of such