I bought the Takahashi 50mm Ocular and then bought the Nagler 31mm too
The Tak did not give me as wide a FOV as the Nagler even though the view was better on the edge of the Tak I still view through the Nagler more.
Since this ocular sits in my case and is not really used I am now selling it
New it goes for $357 plus shippin
You can have this one for $285 including shipping