I have a mirror from a cosmic ray telescope to sell. It's five feet
in diameter and has a focal length around five feet. The mirror is
not optically perfect (which is why I'm selling it), but sets 2 by 4s
on fire in less than a second. The mirror is made from 1/4" glass and
was slump molded. It's mounted to a welded steel frame and backed with
polyurethane foam. The mirror weighs around 70 pounds. It is moved
n its back by placing it on three tires fro cushioning. The mirror
must be covered during transport so it doesn't accidently set fires.
I'm asking $300 for it.