The Pentax 645 I bought from Keh started acting up about three days after the warranty expired. It totally quit working at the worst possible time. OTOH I've got two Kievs. One a 60 I bought off a user on Ebay. The second a 6C that only received a CLA from Arax. Not the full treatment. They both work perfectly. OTOH Pentax wants more then I paid for the camera to fix my 645. That assumes nothing serious is wrong with it. Luckily they still have parts for the thing. Some of the older MF equipment from other manufacturers are totally out of parts.