No such model in the Ruger line.
Ruger has never made a model with that number. You might be referring to a RG, which was made in Germany. No sn records.
30 or so
$25-$45. Low dollar firearm of indifferent quality, no longer manufactured.
I believe what you have isn't a Ruger product, but rather, a Rohm Gmbh revolver, manufactured in Germany, and imported into the country by R.G. Industries. The RG-23 used the .22 Long Rifle cartridge.
I do not believe you have a Ruger, but an RG- Rohm Gemeinschaft. Two very different companies. The RG is generally a low value, low quality firearm that was made in Germany. Value is based on condition, but may be $25-$75.
20-50 or so
15-50 USD
$25 or so. Low value handgun.
this is a very high valued gun and they are very few and far between. i have seen them worth 100,000 depending on the condition
25 USD
ROHM