Couldn't tell you a price. I did have two, but gave one away and am holding on to the other to see how things go. The person I gave one to loves it, as for me. Not my kind of plastic. If you like the hard as a rock putters with no grip, but with straight flight. It's the disc for you. The putter would always slip in my hand to some degree because of the Z plastic, but I also use a loose fan grip too.
I have a lot of these as they were my primary putter for a couple of years. Still keep one in the bag because I am so familiar with them. I would say they aren't worth much. Clearwater has 90 of them up for $10.99 I think. I would say keep it. It flies dead straight and holds really nice lines. I still love mine. If I could find a Crystal Z version I would probably switch back. Try it out for a little bit and see how you like it though.
I think it was not popular due to the large height- most people can barely grip it- and factor in the slippery Z plastic and it was just hard to throw. They replaced it with the soft-X which is a lot easier to grip and catches chains better too of course.