Recently acquired some of my parents old photo gear, actually bought them as gifts back in the late 70's- early 80's. Haven't been used since 1990 Sold a few of the lenses on ebay and locally. The remaining ones there was absolutely no interest. Even at give away prices of $10 each. Sad as two are still like brand new. Remember them costing me a weeks wages each back then. SIGMA 35-135mm F/3.5 - 4.5 MACRO A-III ZOOM LENS Pentax Praktica Screw Mount Aperture stuck wide open, worth taking apart cleaning? If working, worth getting an adapter for it? Otherwise like New SUN OPT (SPIRALTONE) 85-210mm F/4.8 ZOOM LENS Pentax Praktica Screw Mount. Used but clear lens, no fungus, such as here http://www.pentaxforums.com/forums/122-lens-clubs/31353-off-brand-club-33.html ROKINON MINOLTA MD mount 80-250mm F/4.5-4.8 MACRO ZOOM LENS Like New, don't think parents ever used it.