I have a chance to buy an early Ruger Blackhawk in 30 carbine. Current owner is the second owner. He said first owner never fired it; he says he never fired it. Current owner is retired gunsmith and has checked all specs and all are correct. Comes with original box and manual. He is asking $725 for it plus S&H. I have looked at other similar Blackhawks with prices all over the board. What would you pay?