For sale was the best mirror I could locate anywhere in the world.
Paid $1500 US dollars. Unused but now roughly 5 years old. Mostly stored in a wine cellar climate controlled but not for full 5 years.
With US dollar and postage you'll pay $1800 for a lesser accurate mirror.
$1000 or very near offer.
As the brightest people here may know, strehl ratio is not everything but is an excellent benchmark regardless and this baby is .992 but read other stats provided.