It depends what year if its from, since there have been no "real" changes to the mark 3 over the past decades the value I would estimate for your Ruger mark 3 to be worth, assuming its in new condition would be probably be a $320 value. if it is a newer "version" of the mark 3 then probably $360. that is the list price from ruger anyway. also barrel length may effect the price but not drastically and any accessories on the firearm its self. hopefully this answered your question, thank you for asking.
Depends on age and condition. Range from 100-400 USD.
Nope.
50-300 USD or so
50-500 depending on specifics
100-1000 depending on specifics.
Depending on condition, it's worth 3-10 cents.
50-1000 USD or more depending on specifics
$3 to $75,000 depending upon the mint mark and the condition of the coin.
Average circulated coins are 3 to 10 cents. Uncirculated can be as much as $20.00
There are 3 possible mint marks - O, S, and CC. Please post a new question with the specific mark on your coin.
If you found the coin in circulation its worth about 3-6 cents. If it is in original mint packaging then it is worth about $1