Originally posted by The Squirrel Mafia My 2 K-50 bodies haven't had any issues yet. My black one is at about 27,000 shots & my red on is at about 23,000 shots.
I had two K-30 bodies and never had a problem either. I guess most K-30 or K-50 cameras don't, but it's bad news if you do. The question is whether a potential buyer is feeling lucky, and prepared to risk it.
To the OP, one point that won't be obvious, but underlies a number of posts here, is that there is a difference between two broad lines of Pentax APS-C (crop sensor) DSLRs. One line is known as the flagship line: K10D, K20D, K-7, K-5 series, K-3 series. They generally have more robust construction, and are built to last longer. Some have more advanced features than their cheaper contemporaries (e.g. a better system for automatic removal of dust from the sensor). The second line is the consumer line (e.g. K100D series, K200D, K-m, K-x, K-r, K-30, K-50, K-500, K-S1, K-S2, K-70). They have the same sensor as the contemporary flagship (e.g. the K100D series had the same 6mp sensor as the K10D), but were of less robust construction. (It's more complicated than that, both because new consumer models often introduced new or improved features that were not in the contemporary flagship model and because there are models like the K-P that aren't easily classified. But you get the general picture.)
So that's why, if you are looking for a camera that is now 5+ years old, most people are recommending previous flagship models. They were built to last, and there are many that are still going strong.