My two K5 cameras will probably go on a shelf.
I don't sell Pentax gear (usually).
My niece is too young to use them, and her mother, my sister-in-law, has not made much use of the K-x I got her.
I've had too many people be weenies/nit-pick when I have sold older bodies, so it's not worth the hassle to sell them (besides, I don't usually sell Pentax gear).
If there was someone in my life that could use them, I would loan them to them for sure.
You never know, the K5 is still a GREAT camera, so they might continue to be used for projects where I want to shoot stereo cameras, or multiple camera angles or whatever else I can think up.