I have a few Pentax K mount lenses for sale;

 

Pentax DA 18-55mm 1:3.5-5.6 standard kit zoom lens - £35 posted

comes with front and rear caps (front is aftermarket) and aftermarket bayonet lens hood

 

Pentax DAL 50-200mm 1:4-5.6 ED zoom lens - £55 posted

comes with front and back caps

 

Vivitar 75-205mm 1:3.8 Macro Focusing Zoom lens and 2x matched multiplier PK fit - £70 posted

comes with front and back caps for both the lens and the teleconverter

 

 

All lenses are in excellent condition with no scratches, haze, dust or fungus on the glass.  The zoom and focussing are smooth and there is no zoom creep on any of the lenses.  The Pentax lenses focus quickly and accurately on my Pentax K5.  The Vivitar lens is fully manual so if you want to use it with your Pentax DSLR you will need to go through the menus to allow using aperture ring.  Obviously you will also need to manually focus with it.
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a wee bump :-)