the more you pay generally the better, however look for fakes, and learn to spot them,, their are so many fake roors, till recently I am sure I had never seen a real one, just fakes. In my area roors are no longer sold because vendors were selling fakes,and this angered the customers and the roor makers. I always wondered why they were so expensive. I knew mark up was at least 100%, but even so 300 for a roor that doesn't even come with a diffuser. Now I know, how to spot roors, before I was looking at fakes that were faulty. Roor US makes far more than Roor DE so naturally they are gonna have some that aren't up to par that slipped by.