Sorry, I misread your question, and my answer was about the Pentax K. The number of Pentar K was very, very low. Yes, 269$ seems a very low price.
Hi Bosse,A near mint Asahi Pentar (yes Pentar) sold last month on ebay for £269. Were you aware of this? It seems like a very low price.
Hi Richard,21.454 K models were produced between '58 and '59. But Pentax used the letter K for many other models, too. K-series in '75 and digital since 2006.