Put those Kiron lenses on Ebay and you will see that they are not even worth listing.

I'm not saying that they are not any good. They were good. Back in the 80's a friend of mine bought a Pentax ME Super Program. He wanted a zoom lens but couldn't afford the Pentax. I recommended that he buy a Kiron which he did. He loved the lens and claimed the Kiron zoom was sharper than his Pentax 50mm prime lens. Did I believe him? Well lets just say I was happy that he was happy!