50-400 USD or so
10 bucks
100-500
100-300 each
100-300 each
$350-$400, depending on condition. It is still in production.
100-500 or so
The Ruger website, if up, has sn data
You will have to ask Ruger.
100-500 or so
100-1000 USD
100-1000 or more depending on specifics