The value of an NRA Special Edition 22 Ruger pistol actually depends on a couple different things. A couple of these things would be the age and condition of the pistol.
100 dollars
50-200
50-165 or so
25-325 usd
50-175 USD
A call to Ruger will get you the answer.
125 or so
50-500 depending on EXACTLY what you have.
50-1000 or more depending on the specifics.
200-400 USD
You need to contact Ruger. You may have a prototype