If you spend any time following values of used guns you will make yourself crazy
Mark IIs are only valuable as shooters , yes ,because they are Rugers some folks "collect" them but there really isn't hardly a model that Ruger has put out in the last 30 years that they didn't pump out 50,000 or 100,000 of . No real collectors value
Like the Winchester 94 Commemorative . 98% of them that were made are worth about $7 more than a similar condition plain Winchester 94
There are a few odd ones that only were made in small numbers and those can bring some cash , but only if minty with all the paper and box .
When I was helping my buddy in his shop we would sort of hate to see that stuff coming in because it would be a case of somebody getting all butt hurt because they thought they were going to get paid $10,000 for a rifle worth $325 as a trade in