I have the following kit in user condition: Mamiya RZ 67 Two 120 backs 65mm, 90mm, 127mm and 180mm RB lenses 180mm RZ lens Looking to trade for for Hasselblad A12 back(s) or 250mm Hasselblad lens. I've been having trouble with backs, so I would consider trading even for a single A12 back if it is in really, really good condition (e.g. numbers match, spacing is perfect, etc.). I've had it with crummy backs. Prefer local, as shipping would be pricey!