This is a good news, bad news deal. The bad news is there's fungus inside, the good news is otherwise the lens is in very good condition. The pictures aren't great but should give an idea of the extent of the infestation. I don't have a Pentax K mount body so I don't really have much motivation to attempt a disassembly and cleaning, though if nobody claims it I might, just for the experience. How about $20 to cover shipping within the USA in a medium flat rate box .