50-500 usd
Depending on exact model and condition, $150-$300.
I don't know, is it just the barrel or the whole gun? I'd buy just a barrel
100-350 USD
www.gunpartscorp.com might have some.
50-500 usd
It will be marked on the barrel. You can also call or visit ruger's website.
100-1000 USD depending on EXACT configuration, condition, etc..
100-400 USD
$100-$200, depending on model and condition.
100-400 USD depending on condition, accessoires, box, manual.
100-400 USD
50-175 usd