[Captain Marvelous]

I bought the Gokaiger mobirates and like it a lot, so I am looking for a Kamen Rider henshin device. WizardDriver didn't wow me at first, but the videos really made an impression on me. If I want to get it I want all the rings, so roughly how much is it going to cost me if I want everything? And is there a source that offers the cheapest prices?