I have a used Phase One P30+ back for sale in the Mamiya "M" Mount. It has served me very well, but I have returned to shooting 4x5 film and find myself not using the P1 system enough to justify having it on my shelf. I has 9,071 actuations, and is in EX+ condition. The back comes with the Pelican/Phase One case, battery charger, 2 batteries, sensor cleaner, FW Tether cable, and manual. I purchased the back from a certified P1 Dealer, and they have agreed to serve as a reference for the back. I have 100% feedback on ebay under the user name northern155. I am asking $7,900 for the back and accessories. Thanks in advance for your interest.