Originally posted by Scorpio71GR From K10D to my K3 I have never had any issue with a Pentax DSLR. This includes my K-01. I'm a pretty heavy user. I never had a K3 but after 2 years my K50 is still going strong. Personally I do not think is any more issues with Pentax DSLR's than with any other brand. I've been out on photoshoot and seen full frame Nikkons lock up like a brick without any notice. There is always a certain amount of risk when buying any used electronic equipment.
I agree with Scorpio that buying used equipment may give increased risk of failure. However, my K50 was bought brand new and it was also susceptible to failure.