MAXBRIGHT 2" Mirror Diagonal with Dialectric Coating and Brass Locking Ring (PMDMAX):
https://www.astro-physics.com/pmdmax
I bought the diagonal from Logan here:
https://www.iceinspace.com.au/forum/...d.php?t=192037
and used it exactly twice before I sold my last telescope that requires a diagonal (OTI Quantum 6 Mak).
It's a great diagonal and in excellent condition, I like it better than the 2" Takahashi diagonal due to the locking ring.
$400 express posted in Oz.
Cheers!
Arief