All the functions for the most expensive variant have to be free IMO. Bellow i copy past from your web site.

One additional motor
Drilling Cycle Support
Idle speed adjustment
Coordinate system rotation by G-code
Quick start G-Code from an arbitrary line
Performing G-Code backwards
Continuation of the G-Code from the middle of the trajectory

This is ridiculous someone to be charged extra for that basic functions. Now i understand if 4 and 5 axis cost more. But resuming G code, Idle speed adjustment... Is this a joke?