What is the value of Iver Johnson 20 gauge double barrel shotgun serial no. 76786?

The value of an Iver Johnson 20 gauge double barrel shotgun, such as the one with serial number 76786, can vary based on factors like its condition, age, and any unique features. Generally, these shotguns can range from $200 to $1,000 or more. For an accurate appraisal, it's best to consult a firearms expert or a reputable auction house specializing in vintage firearms.