You can measure the barrel yourself if you have it, using a steel tape measure. You can also contact Ruger Customer Service through the Ruger website. There is no published data that gives the barrel length of each firearm made by a given company, only the standard configuration for a given model- and THAT varies.
50-175 or so
100-300 USD
50-500 USD depending on specifics
Depends on condition, and which version/ barrel. Anywhere from $100 to $500.
75-275
100-400
$350-$500, depending on the exact version, and the condition. The rifle is a Number 1, not Mark 1. Only Ruger pistols are Marks.
$250-$500, depending on the EXACT model and condition.
200-400 USD
$150-$250, depending on condition, barrel, sights, etc.
Magazine