Brand new, never been used. Discovery 1.83" Elliptical Flat Secondary Mirror
I purchased this for an 8" scope I was building but ended up using a smaller secondary. $45 includes shipping within CONUS. Paypal OK.
Excerpt from the Discovery web site
"Made from Pyrex brand glass. Enhanced aluminum coatings are standard. Manufactured and tested in our own optical facility. Guaranteed 1/10 wave surface accuracy. "