Just acquired a: (from the email)
Nankivel 8inch f/8 newtonian mirror set - new unused. Other Nankivell elliptical flats and zerodur 1/20 wave flats.
The best way to judge the Nankivell mirrors are to compare them to a modern equivalent say
http://www.rfroyce.com/stand_mirrors.htm
Part of a deceased estate being liquidated I believe. Comes with some Dob components as well but I want to build a longer focal length astrograph. Should have minimal coma and a deeper focal point. If it compares well with a modern Royce hopefully with a Barlow 2 or 3 should give me a planet killer.
Sounds like a fun project 
I needed something to build in the workshop when the clouds are being uncooperative and hanging around. I feel another version of the Serrurier truss coming on.
It's a bit long for my other project, a travelling 6' or 8" which packs down. Might find a mirror set for that one day.
And scored a Shorty 2 x Barlow from elsewhere as well. Needed that.