Pentax K-50 w/Pentax-A 28mm f/2.8 MF lens. Aperture control issue.

Description

This is nice, clean, and pretty Pentax K-50 DSLR camera that comes with a Pentax-A 28mm f/2.8 manual focus lens. A battery, a battery charger, and a 16GB SD card (not shown) is also included.
The camera powers on, the flash fires, and the shutter cycles. I am able to operate the menus. The focus ring is smooth and the aperture ring feels solid. I see a few specs of dust through the viewfinder. The lens looks very clean and clear.
The camera suffers from the notorious aperture control issue when used with automatic lenses in the A position. Manual control and activation with manual lenses and the green button are fine.
The shutter count is about 4173.
I would like to be paid within two days after the close of the auction.
Shipping is calculated by eBay and is based on the package size and weight and your location.
Please feel free to ask questions.
(P.S. I copied this auction listing from my Pentax K-x listing. Please let me know if there are any copy-and-paste errors.)