Hmm.. hope I’m not de-railing the original poster’s topic, but have just come across the Fuji line of rangefinders,
both in 6×7 and 6×9 which seem quite interesting..
You should check to see if these are the leaf shutter lenses. The older of the Mamiya lenses weren’t and had a limiting shutter speed of 1/60th of a second, pretty worthless if you wanted to use fill flash on a bright day. They also didn’t have an interchangeable back, a very handy feature for medium format cameras. Having said that, I had the 645j many years ago and was very happy with the quality but when it was robbed I replaced it with a Bronica ETRS instead as I wanted the option of interchangeable backs and the leaf shutter in the lens.
The Mamiya with the selection of lenses offered is good value if the restrictions above are not a problem and like the others said, you can always make a lower offer and see what they say,