Brand new, never used.
Purchased when I was in the USA a few years ago from Telescopes.net.
https://telescopes.net/store/explore...elescopes.html
Mine was missing the black bit (shown on the website). It's an M42 screw thread (I tested it with an M42 adapter I got).
Now it makes sense why I couldn't attach it to my scope, it was missing that section. I ended up buying another flattener because I needed a reducer/flattener combo.
Unfortunately I did pay $179.99 USD ($250 AUD) + shipping for it at the time (didn't even realise it was missing that adapter).
Buying brand new would be around $300 AUD inc. shipping after conversion.
It's brand new but since it's missing the adapter I will sell this for $180 inc. shipping. Comes with the dust cap and original box.
You may have the suitable adapters in your kits already to screw onto it, I know I do!
PM if interested.