I got a black-paint Pentax MX today with a 50/1.7 lens. The camera was complete in it's case, with an old Pentax Pro strap. Also included with the camera was a prize medallion, it looks like the original owner was an employee of Pentax, and received the camera for some type of achievment.
The viewfinder and lens were full of fungus, and the light seals were quite dry-rotted. I pulled the camera and lens apart, and found that the fungis had not etched into any of the glass. I removed the old rotted foam under the top cover and replaced, as well as the seals and mirror bumper. The camera now looks and works beautifully.
Hopefully I will get a chance to shoot with it this week. I already have too many cameras loaded with film which needs to be used.