For sale is my Mamiya ZD Back (no purple cast, non double buffer model). I bought it from a member of the GetDPI forums in July 2011. He had put on around 5000 actuations, and so have I. It is in great condition, with no dents, dings or scratches, and the glass is clean. I used this back on my 645 AFD as well as my RB67 with the HX702 adapter.
It comes with the padded case, two batteries, charger, AC adapter, AFD focusing screen, manuals, software cd, and firewire cable.
Asking $3000 USD through PayPal.