This is a MUCH nicer eyepiece than the price would indicate. We use it on my wife's 12.5" Portaball and the views are very good, though it isn't very often that it is called into use. I believe I bought this eyepiece from Gary Russell at RTMC about 3 years ago. If you believe otherwise, please let me know. The lenses ar coated and extremely large.
I think $50 + shipping would be a fair price but if you would like to offer, please feel free. Fred