Question on X

[Mezz72]

Assuming everything is the same.

For BNIB,
If price of 116520 black is X, what's the price of the following?
116520 white
116523 black
116523 white

What about for a 5 year old?

For eg, 116520 black = X, 116520 white = X-500 etc etc

[Mezz72]

I'm referring to est selling px n not list px btw.
So many gurus here but none has any ideas? Can't be leh....