Here is a well kept Pentax 645n with a Pentax-FA SMC 45-85mm zoom lens and original shade. The 645n is the easiest to use medium format camera in my opinion. It has accurate autofocus, is easy to handle and has simple and intuitive controls.
I have always had a soft spot for the Pentax 645. While it is less modular than the Mamiya 645, it has all of the features that you need built in, is smaller and has a great feel, including lens focusing that feels better than almost any camera model. It also has:
A built in light meter with auto exposure: aperture priority, shutter priority and Program
Motorized film advance
Two tripod sockets
Very smooth focusing
Bright finder view Comes complete with 75mm f2.8 standard AF lens and 120 back. Ready to shoot!
This camera works perfectly and is in unusually clean condition with only light wear. The lens is clean and scratch-free with no haze nor fungus. Everything is accurate and works perfectly.
This is a good one.