If it is in very good shape I wouldn't take any less then $250.00 (I have one serial #388xx and you couldn'y even touch it for less..
The value of an Iver Johnson Magnum 22 caliber revolver would be dependent upon a number of factors. Some of these factors would be the age and condition.
What is the manufactures date on an Iver Johnson revolver serial # Q18255
My iver johnson has the serial # on the trigger guard
under the grip plate
No good
I recomend you purchase a copy of blue book of gun values .gun values vary for many reasons.this book is used by most dealers and collectors to help assign value.
100-400 USD
100-450 or so
Requires professional appraisal
1991 PX 22
1970
100-400 USD