Here is my story:
After I've read the GAS Pentax 6x7 thread in rangefinderforum, I decided to get one. First I bought a broken film winding mechanism Pentax 67ii with AE Prism for 100 EUR (still haven't repaired it yet, I'm so lazy ). Then I heard about KEH UGLY Grade lens can be useful. Well, I don't want to spend much just for another system, I've had already RZ67. I placed an order with 4 lenses from them for 220 bucks. These lenses turned out to be: a good Pentax 6x7 55mm f4 with small scratches in the front, which won't affect pictures, a mint Takumar 75mm f4.5 with slight haze, a near mint Takumar 105mm and Takumar 200mm with fungus ( I can clean them). Because of the broken Pentax 67ii, I must buy another body to use these lenses. I won an auction and acquierd 2 non MLU Pentax 6x7 bodies with non metered prism for 105 EUR. One is decribed defect, but I fixed it ( so easy) within 1 minute. What they need is new lightseal, that's all. Finally, last week I bought from an English gentleman a defect aperture Pentax 67 45mm for 58 EUR ( I can fix it too).
Now I have a system that I can use in many situation. I dumped all my digital gears not so long ago and I think I did right. MF sure is fun .