Daisy never made a model 120 pellet gun. Are you sure you don't mean a 120 Pellet rifle?
If this is what you are asking about then restate your question with additional information, such as the current condition of the rifle. Give it a ration like Poor, Fair, good, very good or excellent condition. Also stat if it is working or not. Then I will be able to give you an estimate of value.
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