As the title says, I am considering picking up a Colette Frogskin. However, I want to be fair to the person selling it to me, and neither of us are really familiar with the realistic dollar value of this glass. Can anyone give me a rough number as to what would be fair for both ends and what I should expect to see further down the road if I were to wait on it? I know there were only 100 made, but I haven't seen one pop up on the ebay for ages that actually sold Any help is much appreciated. Thanks in advance!