I have been pricing out two Mamiya systems: one based on the RB67 Pro SD and the other on the RZ67 Pro II. What I found has surprised me: the RZ67 costs about the same (if not less) used than the RB67! For example, from KEH an RB67 Pro SD with 3 backs (including Polaroid), a 65mm C lens, a 127mm KL lens, and a 180mm KL lens ran $1,347, all in EX condition. The RZ67, on the other hand, with the same accessories and 65, 110, and 180mm lenses, was $1,498. The backs and 65mm lens were in EX condition, while everything else was EX+. I also noticed that the 180mm KL lens (in EX condition) for the RB was $65 more than the same lens (in EX+ condition) for the RZ. Does this seem right or have I just found the deal of a lifetime on the RZ system? Should I be looking elsewhere for RB gear? None of this is making any sense to me (considering the apparent superiority of the RZ system), but I'm certainly not complaining!