I have a Siebert 35mm for $37.50 plus shipping. I picked up this used eyepiece a couple of weeks ago, and it has been cloudy ever since I bought it. I figure I won't get a clear sky until I get rid of it... I know that these appear to be $69.99 new. If you have five stars on Astromart, I will give an "Arizona Guarantee" on this one... Try it, and if you don't like it, return it within one week for a refund minus the shipping cost.
Thanks for looking,