Impossible to answer without the serial number. You can,
however, call Ruger or visit their webiste and find out.
Ruger.com has sn data on their website. Once you know how old it is, value can be estimated.
Ruger has extensive serial number data on their website.
You can find serial number data on Ruger's web site
100-1000 depending on specifics
100-1000+ depending on condition, accessories, etc..
You have a .44 Magnum Ruger Super Blackhawk, manufactured in 1978. If you had a question of a different nature, you'll have to clarify.
Check w/ Ruger customer service through their website- but my references show the Bisley and the Super Blackhawk as 2 different guns.
Ruger uses a model number, such as 0804, but the suggested retail price of a new Super Blackhawk stainless 44 Mag is $829.
100-1000 USD or more depending on specifics
Extensive sn data is on Ruger's website. 100-499 or so
375-400 if like new condidtion
Storm ruger 44 magnum 10 inch barrel What is it worth
$350-$400 in top condition. firstname.lastname@example.org
Depending on EXACTLY what you have, it could range from a hundred or so to multiple thousands.