i have a friend who has a recently recieved a ruger new model blackhawk serial number 34-97387 in the box with all paperwork extra fitted cylinder in as new conditon . it is 357 caliber with 4 5/8 barrell thinking dated 1978 or 1979. can someone pls give me an idea of the value of this also has set of houge grips extra with it thx in advance.