I have a Nova Optics f4.5 12.5 inch mirror in excellent condition. I also have for sale a matching Novak Aluminum Mirror cell and a four vane spider without diagonal, but with a 2.6" diagonal holder. Will ship anwhere in the continental U.S. for $500.00 OBO. I will include a truss type tube assembly with rocker box for free for anyone who can pick up everything. I live 1/2 hour east of Pittsburgh PA.