This revolver was only offered as a 5"
The run was commissioned by the FBI Ex-Agents Association. 3200 revolvers were produced.
The FBI Ex-Agents Association only offered revolvers to Active or Retired agents. As with all rules there were a few exceptions where revolvers were offered to LEOs working with the Bureau.
There should be a packet of paperwork with the firearm if you are acquiring it from the original Agent.
That envelope contains the letter describing the revolver along with the other paperwork
Value is a subjective thing. I have recently seen them offered from as low as $750 to as much as $2,400. As already mentioned, GB has one at $849 right now.