cheap da* 50-135
You call it cheap...sigh, I remember the days before the big Pentax lenses price adjustment, and got the DA* 50-135 at this exact price, but before a discount. Mind you, I've also got the DA40Ltd for less than $300, the FA35 for less than $300, and the FA50 for $200 something...
My wife and I purchase most of our primes and * lenses back in the day when Pentax stood-out for having great optics at great prices. Alas, these days are but a memory now...