I recently purchased from a gone-digital photographer a set of Kodak Polycontrast filters. I don't use this kind of filter so I am offering them to someone who does.
She said they had never been used; based on my examination of them I believe her. There are no fingerprints or scratches on any of the filters, the plastic and paper sleeves are also like new. The plastic case has some wrinkles on it, from what she did not know. Given the condition of the trays she sold me, I have every reason to believe she takes good care of things.
Freestyle is selling them new for $29. I will let these go for $15 plus shipping.