$250-$425, depending on the exact version (there were several) and condition.
125 USD
It all depends on the model, caliber and condition of the Ruger. If I asked what is the price of a used Chevy you would probably ask. Which one, how old, what condition, Which engine. How many miles? It's the same with a used Ruger.
100-1000 or more depending on specifics
100-350 or so
50-350 usd
100-200
Around $275-$300, depending on condition.
200-400 USD
Go to gunbroker.com look what they are going for...
75-125 or so
100-500 usd
$250-$400, depending on condition and finish.