I agree, I have owned 2 RF hoppers and I couldnt tell the difference between standard modes and RF modes. The only time I saw a difference was when they put my EGO on the machine at a NPPL event to see how fast it could shoot. I saw a difference at 25+ bps. But seeing that you cant shoot that fast in any tourneys I know of, it really isnt worth it.
Contrary to what you may think, you are absolutely responsible for what you ship no matter what you think or say. You do not ship with signature confirmation and insurance good luck to you if it gets lost in mail. Buyer can do a charge back on paypal with no proof of receiving.