How much is a cooey model 840 20 ga worth?

The value of a Cooey Model 840 in 20 gauge typically ranges from $150 to $300, depending on its condition, age, and any unique features. Factors such as the presence of original parts, finish quality, and whether it includes the original box can also influence its market value. For a more accurate appraisal, it's advisable to check current listings or consult a firearms expert.