Probably $50.00 to $125.00 tops - depending upon condition. Need a serial number to date the year of manufacture.Hope this helps some,kcbuck
NOTE: R.G. Industries was an importer who imported cheap revolvers made by Rohm Gmbh of Sontheim/Brenz Germany.
This blog will be helpful to anyone who wants to know about RG revolvers.
While this blog entry is RG10 specific it is applicable to any model of RG revolver.http://www.les-grizzlys-catalans.org/the-rg-10-in-a-nutshell.-1797.html