High value card organisation

I, personally, just keep all of my cards in the same place, same order, no matter the value.  Prices are so relative, and some of them fluctuate a lot depending upon the current meta and any new cards that come and go.  So, for me, it is easier to just know that I can go look in my binder under Color > Set and then find the card alphabetically, instead of having to stop and think whether the card may or may not be worth >$X.

That being said, that is for my personal collection.  If we were talking a trade binder, then it definitely could be advantageous to separate binders by value and only pull out the "expensive" binder when you really wanted something big.