Two new 'Old' Gift Cameras -- a 1975 Asahi PENTAX KX body which was refused by a dealer as 'Not Working' but when I looked the lever working the aperture was not moving so I put a minute amount of Three-in-One OIL onto it and pulled and it moved and has worked ever since and a 1996 Pentax MZ-5 with two lenses -- the 100-300mm SMC Pentax-F does not 'zoom' any more being stuck at 300mm but it is sharp !

Asahi Pentax KX by pentaxpete, on Flickr

Pentax MZ-5 by pentaxpete, on Flickr