20% off isn't enough to deal with that service cost and PITA factor of sealing the things.
What you are stating is extremely misleading:
1. You only have to deal with it every many years between servicing
2. You aren't going to be sealing the first stages, the technician will be the one and hence you will have no PITA. Sealing the first stage isn't a PITA or any type of pain actually for the technician. If you have the proper tool and training, it is a straight forward process if you follow the mfg process. At any rate, it doesn't have anything to do with the owner/user and there is absolutely NO PITA for any type of pain anywhere, saying so is a myth at best. In fact, the Atomic regulators have a very low cost of ownership over the lifetime of the regulator compared with all other brand modern regulators with the added benefit of the Atomic regulators having the best performance, reliability and awesomeness.