Flee! Fleeeee!
Don't let the looks fool you.
"Hit or miss" is charitable.
We had one at our high-school astronomy club.
It was months before I looked through a proper Newt and realised what a P.O.S the Criterion was.
Even in 'mint' condition, the unlucky owner should expect to pay someone else to take it away.
Seriously?
Maybe $200-$300 tops for a minter with 'good' optics. About $30-$50 in the condition you describe.