15-50 USD
About $50-$75. Rohm, also known as RG, was an inexpensive low quality handgun.
25-65 USD or so
Most Rohm revolvers were considered low quality/ low value firearms. Depending on condition, $100.
RG is short for "Rohm Gmbh" which essentially is Rohm Ltd. in German. Rohm manufactured inexpensive (and somewhat questionable quality) handguns until 1986.
40 or so
$65-$120 depending on condition
Try e-gunparts.com
50 USD or so
50-300 USD or so
Depends on the condition of the two- but in general, the Rohm firearms are considered low value and indifferent quality.
Better than a rock, but, not by a whole lot.