Up for sale is a set of Denk 21mm 3D eyepieces which comprises
The Lederman Optical Array (EP) and a pair of neutrals (for lunar viewing, etc)
3 eyepieces in total.
They have been used once at night and once during the day on my H/A solar scope.
The solar scope has an an F30 focal ratio, so the 21mm eyepieces are just too much magnification. Off to a new home they go.
You can check the literature and the new price direct from the manufacturer, here:
https://www.3dastronomy.com/shop/
With GST and shipping you wont get much change out of $1400.
You can have these for $800 shipped. (express post with tracking)
There is not a mark on them. They are in show room condition.