Gun shop, gun shows, pawn shops, on line auction sites, garage sales, want ads.
Primarily in the magazines; Mark II has a bolt hol open also
Contact ruger and request a owner's manual
If it's a MK II, it will be marked as such.
50-250
Ruger's site is not working for me. They have extensive sn data.
50-500 usd
100-450
Which one?...The Mark 1's and Mark 2's are pretty valuable...
100-550 or so
100-500 usd
Go to the Ruger website, look under customer service, historical data
100-400 USD