$125-$175, depending on condition.
Worth about $300, depending on condition. Ruger website, customer service, has dates of production by model and serial number.
$300
75-175 USD
100-1000 depending on specifics
Ruger's website has extensive sn data available for all. 150 USD or so
50-180 or so
50-250 dollars
Impossible to value with just the sn.
100-300 USD or so
50-400 usd
Impossible to answer without knowing condition
325 or so