I just bought one that may have been fired and without a box for $160. I am satisfied tho I don't know if I paid more than market value, or not.
Chief aka Maxx Load
If truly unfired just as it shipped from Ruger...it would probably have a very slight premium over a non-40th model but unless it's someone specifically looking for it as a keepsake collectable, it's just another 10/22. Just too many produced for any real demand, at least now. Value...I'll venture a guess and say $250-$275 if indeed brand NIB.