Hi. I have an Aptus 22 back in immaculate condition, and a Mamiya AFD in almost-as-nice condition. I have got to the point where I find the system too hard to lug about (I am 61 and have osteo-arthritis and spinal injuries).
However, I am in Australia, so postage could be hefty, depending on where you are. I also have a range of Mamiya lenses, from 35mm to 210mm (all manual focus and aperture, including a 50mm shift and an 80mm macro). Please PM me if you would like to know more!