They probably don't move many of them. Hence why they didn't pass the full discount, which would hurt them.
I'm yet to meet anyone in the field who owns any type 6's. With 12mm of stated ER, I'm not surprised.
Also, if your willing to spend ~$450 for an eyepiece, you may as well pony up for the equivalent focal length Delos, which is sensibly, optically perfect. With only 10 degree AFOV less with 20mm ER I couldn't see why you wouldn't pass over the type 6.
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