Moving to a Hassie H system so, selling off most of my Mamiya/P1 and Pentax gear. Shipping is extra but paypal fees are on me.
Phase One 645DF+ w/Phase One P30+ 31mpx CCD back. --- $1700
(I can split it as well, $600 for body and $1200 for back)
P30+ back has a little over 32K actuations, 3 batteries, 16gb Kingston CF card. CCD sensor is clean and free of any scratches, etc. and comes with cap/protector. These older sensors are amazing. My plan was to find a p65+ as they are full frame 645 but instead looking into Hassie system. Body has 2 brassed spots on edge of prism but overall in exc- shape. VF is great.
I had to satisfy my own curiosity - although 120 film is 61.2mm +/- .5mm, the frame size has to fit comfortably inside that with room for the edge markings on both sides. 645,then will differ from camera to camera, but is pretty close to 56mm x 41mm. So you're right - the difference between that and the p65+ 53.9mm x 40.4mm is negligible.