I've been vaping from 901s simply because I started with them and have all this.....stuff. You know. Recently tried a 201 and was truly startled. More of everything. It gave me what I thought I'd have to go to 6 volt to achieve. After one day it took three days to feel OK with my little 901s. When I started to price 201 atomizers I was again startled, this time by the prices. Any idea why they are so expensive? Are there any good prices on them out there?