According to the Reference of Ruger Firearms (pg. 108) by Chad Hiddelson (RENE) it is classified as "scarce". I can not find my book of values right now so I can't give you a decent answer. I will tell you this. Ruger has made hundreds of types of guns so collecting has to be broken down by type. Ok, say you pick single sixes, there are multiple variations of this gun, so you have to break this down by type. Meaning folks will collect Old Model star marked, or Old Model D (duplicate serial no.), or Flatgates, or by barrel length, on and on and on. With that said some folks just collect "star marked", believe it or not just in the instance of you pistol there are many variations by barrel length and finish, there are actually "one off" models (only one known to exist). Now yours isn't one of those but it is not a high production model. To a shooter you are right it is worth a couple hundred bucks but to a collector who collects that particular type it is worth more. I collect but never picked a genre.
IMO just enjoy it or find a convertible model and enjoy it and put that one away. If I find my book of values I will post what it says it is worth.
Karl